Shanghai Huabang Industrial Business Network - voltmeter

[voltmeter]YV2172B/YB2173B Digital AC Millivolt Meter

2026-6-15 21:48:11

YV2172B/YB2173B Digital AC Millivolt Meter

Functional Features
Equipped with over range automatic flashing function;
Dual channel, with synchronous/asynchronous operation (YB2173B);
Each channel displays 4 digits, with high measurement accuracy and good frequency characteristics;
Ultra wide AC voltage measurement range, 30mV-300V;
High resolution, up to 1mV;
Adopting advanced digital switches instead of traditional attenuation switches, making it lightweight, durable, and free from displacement and slipping concerns;
Using light-emitting diodes to indicate range and status;
High impedance, low noise, linear sign;
Equipped with common ground/floating function to ensure safe and accurate measurement at different voltage reference points (YB2173B).

Project/Model		YB2172B	YB2173ceB
	Measure voltage range	30��V��300V
	Frequency range for measuring voltage	10Hz��2MHz
	resolution	1��V
	Voltage range	6-speed 3mV-300V
	Voltage error	± 0.5 ± 2 words (based on 1kHz)
	Input voltage DC+ACp-p	300V 3mV~300mV range
		500V 3mV~300mV range
	input impedance	��10M��
	input capacitance	��35pF
	input voltage	1Vrms±10%
	Output voltage frequency response	10Hz~200kHz ��± 3% (based on 1kHz, no load)
	power supply voltage	AC 220V±10%�� 50Hz±4%
physics characteristic	Overall dimensions	225W×105H×285D��mm��
	quality	About 2.5kg	About 3kg

YV2172B/YB2173B Digital AC Millivolt Meter

[voltmeter]TC1911 type dual input single display AC digital millivolt meter

2026-6-15 21:48:03

TC1911 type dual input single display AC digital millivolt meter

Performance characteristics:
Wide measurement voltage range and wide frequency band
It can simultaneously measure two signals, indicate at the same time, measure accurately, have input protection function, have IV AC output, over range alarm, strong reliability, durability, and small size.
Technical parameters of TC1911 dual input single display AC digital millivolt meter:
Measurement voltage range: 100UV -400V
Classification: 40mv, 400mv, 4v, 400v
Measurement voltage frequency range: 10Hz-2MHz
Resolution: 10uV Accuracy: ± 0.5% Reading ± 6 words
Input impedance: Resistance: �� 10M ��, capacitance �� 35PF
Left and right channel conversion function: Yes
Instrument dimensions: 140 × 166 × 240mm
Net weight: 2.5kg

[voltmeter]TC2172 AC Millivolt Meter

2026-6-15 21:47:53

Performance characteristics of TC2172 AC millivolt meter:

Wide measurement voltage range, wide frequency range, accurate measurement
Equipped with input protection function, 1V AC output, and automatic zeroing
High impedance, high sensitivity, low noise, automatic calibration, range conversion without zero adjustment

Main technical specifications of TC2172 AC millivolt meter:
Measurement voltage range: 100uV-300V
Frequency range for measuring voltage: 5Hz-2MHz
Inherent error in measuring voltage: ± 2%
Input resistance: 10M ��
Input capacitance: 35PF
Dimensions: 140 × 166 × 240mm

[voltmeter]TC2270A ultra-high frequency digital millivolt meter

2026-6-15 21:47:45

The main performance characteristics of TC2270A ultra-high frequency digital millivolt meter are:
High brightness LCD display screen reading.
Linear scale, high measurement accuracy.
Scalable range
Equipped with USB interface.

TC2270A ultra-high frequency digital millivolt meter main technical specifications:
Voltage measurement range: 800uV-10V. The voltage divider can be extended to 300V
Inherent error: ��± 2%
Frequency measurement range: 20KHz-1000MHz
Input capacitance: ��± 2.5PF
Standing wave coefficient of coaxial T-joint: ��± 1.35 (at 1000MHz)

[voltmeter]TC22A ultra-high frequency millivolt meter

2026-6-15 21:47:35

The TC22A ultra-high frequency millivolt meter has a linear scale, high measurement accuracy, no need for gear adjustment or self calibration, stable working performance, and expandable range

Technical parameters of TC22A ultra-high frequency millivolt meter:
Measurement voltage range: 800uv -10V divided into eight ranges (with a voltage divider that can measure up to 300V)
Measurement voltage frequency range: 20kHz-1000MHz
Basic range inherent error: ± 2%
Instrument dimensions: 140 × 166 × 240mm
Net weight: 2.5kg

[voltmeter]TC2290A Dual channel AC millivolt meter

2026-6-15 21:47:26

TC2290A dual channel AC millivolt meter

Performance characteristics:
Wide measurement voltage range, wide frequency range, accurate measurement
Equipped with input protection function, 1V AC output, and automatic zeroing
High impedance, high sensitivity, low noise, automatic calibration, range conversion without zero adjustment
Two inputs allow for simultaneous viewing of two signals, making it convenient and accurate

TC2290A Dual Channel AC Millivolt Meter Main Technical Specifications:

Measurement voltage range: 100uV-300V
Frequency range for measuring voltage: 5Hz-2MHz
Inherent error in measuring voltage: ± 2%
Input resistance: 10M ��
Input capacitance: 35PF
Dimensions: 140 × 166 × 240mm

[voltmeter]TC2172A Single input single pointer coded switch AC millivolt meter

2026-6-15 21:47:16

TC2172A single input single pointer coded switch AC millivolt meter

Performance characteristics:
Adopting intelligent integrated circuits, ultra wide AC measurement range and ultra wide frequency response
Intelligent reset has input protection function
The intelligent digital range switch has a light touch, long lifespan, and can rotate 360 degrees, eliminating the phenomenon of displacement and slipping of the range switch

TC2172A single input single pointer coded switch AC millivolt meter technical parameters:
Measurement voltage range: 30uV-100V
Frequency range for measuring voltage: 5Hz-2MHz
Inherent error in measuring voltage: ± 3%
Input resistance: 2M ��
Input capacitance: 20PF
Dimensions: 140 × 166 × 240mm

[voltmeter]1932 series three and a half digit AC voltmeter

2026-6-15 21:47:08

1932 series three and a half digit AC voltmeter

The 1932 series three and a half position AC voltmeter adopts integrated circuits, ultra-high precision winding resistors, low ultrasonic operational amplifiers DC-DC conversion inverters, floating power supply, to achieve higher measurement accuracy, resolution of 1uV, stable and reliable performance, ultra-low float, impedance, strong anti-interference ability, LED display, clear reading, ultra wide measurement range, can be combined as needed, easy to use, low power consumption, and high cost-effectiveness.
The basic error of this series is ��± 0.1% ± 2 words
Measurement frequency: 10Hz-100kHz
Sampling speed: 2.5 times/second
Maximum display: 1999 (4-digit LED)
Range mode: manual
Input impedance:>10M ��
Power consumption: �� 2.5W
Net weight: 1.2KG
Appearance: 215X180X80mm

range	resolution
200mv/2v/20v/200v/1000v	100uv/1mv/10mv/100mv/1v
200mv/2v/20v	100uv/1mv/10mv
2v/20v/200v	1mv/10mv/100mv
20v/200v/1000v	10mv/100mv/1v

[voltmeter]1942 series four and a half digit AC voltmeter

2026-6-15 21:46:58

1942 series four and a half digit AC voltmeter

The 1942 series four and a half position AC voltmeter adopts integrated circuits, ultra-high precision winding resistors, low ultrasonic operational amplifiers DC-DC conversion inverters, floating power supply, to achieve higher measurement accuracy, resolution of 1uV, stable and reliable performance, ultra-low float, impedance, strong anti-interference ability, LED display, clear reading, ultra wide measurement range, can be combined as needed, easy to use, low power consumption, and high cost-effectiveness.
The basic error of this series is ��± 0.05% ± 2 words
Measurement frequency: 10Hz-100Hz
Sampling speed: 2.5 times/second
Maximum display: 19999 (5-digit LED)
Range mode: manual
Input impedance:>10M ��
Power consumption: �� 4.5W
Net weight: 1.5KG
Appearance: 230X230X85mm

20mv/200mv/2V/20V/200V/1000V	1uv/10uv/100uv/1mv/10mv/100mv
20mv/200mv/2v	1uv/1uv/100uv
200mv/2v/20v	10uv/100uv/1mv
2v/20v/200v	100uv/1mv/10mv
20v/200v/1000v	1mv/10mv/100mv

[voltmeter]RVT-322 Dual channel AC millivolt meter

2026-6-15 21:46:49

RVT-322 Dual Channel AC Millivolt Meter

frequency range		10Hz��1MHz
Input	voltage range	300 �� V to 100V full scale, with a total of 12 levels
	Decibel range	-70db~+40db, a total of 12 levels
	accuracy	+3% full scale
	Operation Mode	Channel 1 and Channel 2 are separated independently or synchronized with Channel 1
	frequency response	20Hz��200kHz±3%
		10Hz��500kHz±5%
		10Hz��1MHz±10%��reference 1kHz��
	input impedance	Each range has an input impedance of 1M �� and an input capacitance not exceeding 40pF
Output	output voltage	At full scale, approximately 0.1Vrms
Output	distortion	��2%
working environment		0�桫40�棬��85%RH
power consumption		��6W
Power requirements		110/220V±10%��50Hz/60Hz±5%
weight		2.56kg

RVT-322 Dual Channel AC Millivolt Meter

[voltmeter]RK1940 series high-voltage digital meter

2026-6-15 21:46:40

RK1940 series high-voltage digital meter

model	RK1940-1	Rk1940-2	RK1940-3	RK1940-4	RK1940-5
Test voltage (AC/DC)	500V��10kV	500V��20kV	500V��30kV	500V��40kV	500V��50kV
voltage resolution	1V				100V
Voltage accuracy	3% ± 3 words				3% ± 3 words
input impedance	1000M��
display mode	41/2 digit display
working environment	0�桫40�棬��85%RH
Power requirements	220V±10%��50Hz±5%
Overall dimensions	285145220mm
weight	2.7kg

RK1940 series high-voltage digital meter

[voltmeter]DP3=DV series DC digital voltmeter

2026-6-15 21:46:31

DP3=DV series DC digital voltmeter

Model	range	basic error	resolution	input impedance	Maximum allowable input
DP3-DV0.2	0.2V	±0.5%F.S±2Digit	0.1mV	5M��	5V (peak)
DP3-DV2	2V	±0.5%F.S±2Digit	1mV	5M��	10V (peak)
DP3-DV20	20V	±0.5%F.S±2Digit	10mV	5M��	50V (peak)
DP3-DV200	200V	±0.5%F.S±2Digit	100mV	5M��	500V (peak)
DP3-DV500	500V	±0.5%F.S±2Digit	100mV	5M��	800V (peak)

[voltmeter]DP3-AV AC digital voltmeter

2026-6-15 21:46:22

DP3-AV AC digital voltmeter

Model	range	basic error	resolution	Transformer variation	input impedance	Maximum allowable input
DP3 -AV0.2	0.2V	±0.5%F.S±2Digit	0.1mV	Direct input	5M��	5V (peak)
DP3-AV2	2V	±0.5%F.S±2Digit	1mV	Direct input	5M��	10V (peak)
DP3-AV20	20V	±0.5%F.S±2Digit	10 mV	Direct input	5M��	50V (peak)
DP3-AV200	200V	±0.5%F.S±2Digit	100mV	Direct input	5M��	500V (peak)
DP3-AV600	600V	±0.5%F.S±2Digit	1000mV	Direct input	5M��	1000V (peak)

[voltmeter]PK-V series programmable voltmeter

2026-6-15 21:46:13

The PK-V series programmable voltmeter is an updated product of traditional digital display instruments. In addition to the display function of traditional products, this product also has programmable function, DC4-20mA analog transmission output, RS485 communication interface, and relay alarm output. The instrument adopts high-performance microprocessors and high-precision AD chips, which have the characteristics of high stability, beautiful appearance, and good electromagnetic compatibility.

Technical parameters of PK-V series programmable voltmeter

input signal	AC 45~65Hz or DC voltage signal, 0~600V
sampling rate	4000 times per second
permitted Overload	1.2 times the range
measurement accuracy	Superior to level 0.2
display mode	4-digit 0.36/0.56/0.8 inch high brightness LED digital display
Display magnification	1 to 2000 can be set
Display updates	About 3 times per second
working power supply	AC220V ± 10%, power consumption<2W
working environment	Temperature: -10 �� to 50 ��; Humidity: 20% to 90% (no condensation).
Optional features
communication interface	Two line RS485 communication, standard MODBUS-RTU communication protocol
transmitter output	DC 4-20mA (load resistance �� 300 ��)
alarm output	2-channel lower limit relay open circuit output, contact capacity: AC240/7A, DC28V/10A

PK-V Series Programmable Voltage Meter Selection Table

model						Explanation
PK	��U	��	��	��	��	Programmable intelligent voltmeter
outside form ruler inch	F48U					48*48mm
	B96U					48*96 mm
	F96U					96*96 mm
	B80U					80*160mm
RS-485 communication		0				No communication interface
RS-485 communication		one				RS-485 interface
transmitter output			0			No transmitter output
transmitter output			one			4-20mA transmission output
alarm output				0		No alarm output
alarm output				one		Relay alarm output
input range					X	0-600V input

[voltmeter]61L13-V AC voltmeter

2026-6-15 21:46:04

61L13-V AC voltmeter

AC:250V��
Appearance 72 * 72mm
Hole size 68 * 68mm

[voltmeter]AS1911 Dual channel digital AC millivolt meter

2026-6-15 21:45:55

AS1911 dual channel digital AC millivolt meter is one of the newly developed intelligent products. It has a microprocessor inside, and the operation of each key on the panel is controlled by the CPU. The current two states and measurement results are clearly displayed on the panel through two sets of four digit digital tubes and two sets of light-emitting diodes; Adopting a light touch button, it feels light and reliable

AS1911 Dual Channel Digital AC Millivolt Meter Technical Parameters

Two sets of four digit LED digital display voltage values

High sensitivity, 10 �� V resolution,
Isolation level>100dB
Wide measurement voltage range: 100 �� V to 400V
Measurement level range -100dB -+52dB
Frequency response width: 5Hz~2MHz
Low measurement error: 0.5% ± 5 words
Lightly touch range switch, without the usual worry of knob slipping or misalignment
The machine has low noise and small measurement error
Input impedance: 10M ��/40PF (excluding input cable)
There are manual and automatic range settings; The measurement results are available in Vrms value, dB value, and dBm value for selection; And there are two input ports, which can read the dB difference between the two ports, saving a lot of manual calculation Before shutting down, remember the last state and restore the last set state on the next power up

[voltmeter]AS2173E AC millivolt meter

2026-6-15 21:45:46

AS2173E AC Millivolt Meter: This machine has on/off protection function and automatic setting function to ensure safe high voltage measurement and accurate micro voltage measurement. The pointer shaking during signal range conversion is minimal.

AS2173E AC millivolt meter will be an ideal choice for audio engineering, college electrical engineering, electronic laboratories, and analog signal testing.

Measurement range: Thirteen levels, measuring range of 30 �� V to 300V
Compatible with high sensitivity and large dynamics
Basic measurement error: �� 2% (based on 1KHz)
Control mode: CPU software controls digital switch, with manual and automatic range settings
Local noise: �� 5 �� V
Frequency response: 5Hz-2MHz, measured up to 3MHz
Input impedance: �� 10M ��, high impedance is the basis for ensuring correct testing
Friendly human-machine interface: gentle digital range switch, circular arrangement LED clear display status.
Durable and long-lasting, without the worry of misalignment or slipping, with input protection and output current limiting, and the meter is free from overshoot.

[voltmeter]AS2295A Dual Input AC Millivolt Meter

2026-6-15 21:45:37

AS2295A dual input AC millivolt meter: gentle digital range switch, durable: no worries of misalignment and slipping, dual pin display on the same meter Input protection and output current limiting, the meter is free from overshoot Automatic zeroing function, touch the key to select synchronous/asynchronous operation. During synchronous control, both left and right switches can control the range, and the pointer shaking during range conversion is minimal. It has switch protection function, common ground, floating function, and dual channel synchronous/asynchronous range control functions, making high voltage measurement safe and micro voltage measurement accurate Can conveniently test dual channel balance and amplifier gain This machine will be an ideal choice for audio engineering, college electricians, electronic laboratories, and analog signal testing

AS2295A Dual Input AC Millivolt Meter Technical Parameters

Measurement voltage range: 30 �� V-300V divided into 13 levels
Measurement voltage frequency range: 5Hz~2MHz, actual measurement can reach 3MHz
Measurement level range: -90dBV to+50 dBV, -90dBm to+52 dBm
Output characteristics: Open circuit output voltage of 100mV, output impedance of approximately 600 �� (at full input voltage), distortion �� 5%
Digital switch+touch key CPU software control
High input impedance: �� 2M ��, high impedance is the foundation for ensuring correct testing.
Equipped with on/off protection function and common ground/floating function
Basic measurement error: �� 2% (based on 1KHz)

[voltmeter]AS2294D Dual channel AC millivolt meter

2026-6-15 21:45:08

AS2294D dual channel AC millivolt meter: gentle digital range switch, durable: no worries of misalignment and slipping, dual pin display on the same meter Input protection and output current limiting, the meter is free from overshoot Automatic zeroing function, touch the key to select synchronous/asynchronous operation. During synchronous control, both left and right switches can control the range, and the pointer shaking during range conversion is minimal. It has switch protection function, common ground, floating function, and dual channel synchronous/asynchronous range control functions, making high voltage measurement safe and micro voltage measurement accurate Can conveniently test dual channel balance and amplifier gain This machine will be an ideal choice for audio engineering, college electricians, electronic laboratories, and analog signal testing

AS2294D Dual Channel AC Millivolt Meter Technical Parameters

Voltage measurement range: Thirteen levels with a range of 30 �� V to 300V
Local noise: �� 5 �� V, the highest level in China
Frequency response: 5Hz-2MHz, measured up to 5MHz
Input impedance: �� 2M ��, high impedance is the basis for ensuring correct testing
Control method: CPU software controls digital switch+touch key
Basic measurement error: �� 2% (based on 1KHz)
Local noise voltage: �� 5 �� V
Isolation between two channels: 100dB

[voltmeter]AS2272(1GHZ) Ultra High Frequency Digital Liquid Crystal Millivolt Meter

2026-6-15 21:44:51

AS2272 ultra-high frequency digital LCD millivolt meter (1GHz) adopts large-scale integrated circuits and microprocessor chips, with automatic measurement, data processing functions, and user-friendly interface
Adopting an LCD display screen, it simultaneously displays the instrument status and measurement results, with high-precision readings of five significant digits
Automatic range/manual range setting, measurement results displayed on the same screen as valid values and dBm values
Advanced dual diode detection and low-noise deep negative feedback amplification circuit ensure measurement stability

�� dB key: arbitrarily set the reference 0V and 0dBm, quickly measure gain, amplitude frequency characteristics, insertion loss, frequency response, transmission coefficient, etc

AS2272 ultra-high frequency digital LCD millivolt meter (1GHz) with automatic zero calibration function: accurate measurement of small signals, can achieve automatic zero adjustment of the instrument

project	technical performance	remark
Frequency range of the measured voltage	1KHZ-1000MHZ	5HZ-1000MHz (optional probe)
Voltage measurement range	1MV-10V (four gears)	The 40dB voltage divider can be extended to 1000V
Level measurement range	50 �� system: -48-+33dBm (0dBm=0.224V)	75 �� system: -50-+31dBm (0dBm=0.274V)
Inherent error in voltage measurement	10mV: ± 1.5% ± 0.5mV (full-scale value)	The remaining levels are: ± 1% (full degree value)
The influence of natural frequency on error	±3%
input capacitance	<2.5PF
Overall dimensions	240X270X88
weight	About 3KG

[voltmeter]AS2271A ultra-high frequency millivolt meter

2026-6-15 21:44:38

The AS2271A ultra-high frequency millivolt meter features advanced dual diode detection, low-noise deep negative feedback amplification circuit to ensure measurement stability. The touch switch switching, insulation measures on the housing, and temperature compensation circuit make the indication more stable.

project	technical performance	remark
Frequency range of the measured voltage	1KHZ-1000MHZ	5HZ-1000MHz (optional probe)
Voltage measurement range	300��V-3V	300mV-300v (voltage divider)
Level measurement range	50 �� system: -60+21dBm (0dBm=1mw)	75 �� system: -60+21dBm (0dBm=1mw)
Inherent error in voltage measurement	<3%	Output impedance 1K ��
Output DC voltage	100 ± 5% (full scale)
input capacitance	<2.5PF
Overall dimensions	240X260X122
weight	About 4KG

[voltmeter]AS1912 True RMS Millivolt Meter

2026-6-15 21:44:21

AS1912 true RMS millivolt meter is used to measure the RMS voltage and frequency of any waveform. The LCD screen displays the measurement results and the current instrument status, and the range can be set to manual or automatic mode. The measurement results can select the voltage effective value, dBm value, and frequency value of the measured signal. The setting of �� dB function can be used for measuring gain, transmission ratio, insertion loss, etc.

AS1912 True RMS Millivolt Meter Technical Performance

Measure voltage range		Six ranges of 4mV, 40mV, 400mV, 4V, 40V, 400V
Measurement frequency range		5Hz �� 5MHz
Measurement level range		�� 90dB �� 52d �� 0dB=1V �� 88dBm �� 54dBm �� 0dBm=0.775V ��
Voltage measurement error		Full value ± 1% ± 8 words
Frequency influence error		5Hz �� 1MHz ± 2% �� 5Hz �� 5MHz ± 5%
input resistance		About 2M �� at 1kHz
input capacitance		�� 40Pf (excluding cables)
Noise voltage		�� 2 words (when there is a good short circuit at the input terminal)

[voltmeter]DMUJB Type Plate Potentiometer

2026-6-15 21:44:11

DMUJB Plate Potentiometer Description:

name	Plate type potential difference meter	Tested battery box	Protect conversion components	galvanometer	resistance box	Sliding change	power supply
parameter	Effective length 1m	Section 1#	0~1M�� 2 * Double Knife Double	AC5	ZX21a	300��	0~6V
function	balance adjustment	Sample Ex	Assist in leveling the switching circuit	Balance indication	Measure the internal resistance of Ex	Adjust power supply	power supply
Scale: 1.1 * 0.09 * 0.07m^three				Weight: 2.2kg

DMUJB type plate potential difference meter

[voltmeter]UJ24 Type DC Potentiometer

2026-6-15 21:44:01

1�� Purpose:
The UJ24 type DC potentiometer is a precision high potential DC potentiometer that can directly measure DC potential. Equipped with standard resistors, it can measure DC current, resistance, and power.

2�� Principle
This potentiometer adopts the principle of compensation method to compare the measured electromotive force with a constant standard electromotive force, which is a high-precision method for measuring electromotive force.
(1) There is no need to measure the current in the circuit, just measure the ratio of RK=to RNR.
(2) When fully compensated, no current flows between the measuring circuit and the measured circuit, and the measuring circuit does not consume the energy of the measured circuit.
(3) The accuracy of the measurement depends on the accuracy of the ratio of the standard battery electromotive force EN and the compensation resistor RK of the measured electromotive force to the standard battery electromotive force compensation resistor RN, as well as the stability of the operating current. Due to the high manufacturing accuracy and stability of the standard battery RK and RN resistors, the accuracy and stability of the measurement are also determined. Under the conditions of using high-sensitivity galvanometers and high stable current operation, the measurement results can be extremely accurate.

3�� Line and structure
The working current of UJ24 type DC potentiometer is 0.1 milliampere, with 10000 ohms per volt.
The potentiometer has six measuring plates, and its range of measuring electromotive force is as follows:
The first measurement of the ten pin disk is 0.1 volts x 20, consisting of 15 pieces of 1000 ohms
The second measurement of the ten pin disk is 0.01 volts x 10, consisting of 10 pieces of 100 ohms
The third measurement consists of 20 10 ohm panels measuring 0.001 volts x 10 on a ten pin disk
The fourth measurement of the ten pin disk is 0.0001 volts x 10, consisting of 20 pieces of 1 ohm
The fifth measurement of the ten pin disk is 0.00001 volts x 10, consisting of 20 pieces of 0.1 ohms
The working current consists of three disks, with adjustable ranges as follows:
17×240+17×14.5+(0~20)��
The "Unknown 1", "Unknown 2", and "Electrometer" each consist of two terminal knobs for connecting the measured potential and external zero point indicator. Except for the "Electrometer" terminal knob, all others are marked with a "+-" polarity symbol to avoid polarity errors during wiring.
The "standard", "unknown", and "disconnect" switches can be used to connect standard batteries, measure electromotive force, and disconnect measurement lines; The "coarse", "medium", "fine", "short circuit", and "output" switches can be used to select whether the "zero pointer" protection is turned on, through, or short circuited, or to select whether the "unknown" terminal outputs a potential equal to the reading on the measuring dial.
The structure of the potentiometer: All ten input disks are made of high insulation materials, and the electric brushes and contacts are made of silver materials.
4�� Technical features and kits
��1�� Main characteristics of UJ24 high resistance potentiometer:
(1) The upper limit of this instrument is 1.61110 volts, and the minimum division value is 10 microvolts. If equipped with a 0.01 level voltage divider to expand the measurement range, the measurement limit of the potentiometer can be increased to 600 volts.
(2) When measuring under normal conditions at a temperature of+17 ��~23 �� and a relative humidity below 80%, the maximum absolute error within the entire measurement range of the potentiometer should not exceed the calculated value using the following formula:
��=± (UX × 10-4 ± 5 × 10-6) (volts)
In the formula, UX represents the reading value of UJ24 on the reading dial (in volts)
(3) The insulation strength between the potential difference meter circuit and the casing can withstand an actual sinusoidal AC voltage of 2000 volts at a power frequency of 50 Hz for 1 minute without breaking through.
(4) Dimensions of potential difference meter: 450 × 300 × 145 millimeters
(5) Potentiometer weight: 4.5 kilograms
��2�� Equipment used in conjunction with a potential difference meter:
(1) 0.01 or 0.02 level voltage divider box.
(2) 0.01 or 0.02 level standard resistance.

5�� Usage Regulations
��1�� Measurement of electromotive force:
Before using the potential difference meter, first place the "standard", "unknown", and "off" conversion switches in the "off" position, set the "coarse", "medium", "fine", "short circuit", and "output" conversion switches in the "coarse" position, and then connect the measured electromotive force to the corresponding terminal knobs in positive and negative polarity.
Turn the state switch of the whole machine to the "standard" position, and turn the "coarse", "medium", and "fine" adjustment knobs (resistors) of the working current to make the ammeter point to zero. Set the status switch of the ammeter to the "fine" position, and further adjust the "coarse", "medium", and "fine" knobs to make the ammeter point to zero. Turn the whole machine state conversion switch to the "unknown" position, place the ammeter state conversion switch in the "coarse" and "fine" positions, adjust the five ten inch measuring dial knobs to make the ammeter point to zero. The reading indicated by this row of knobs is the measured electromotive force value.
��2�� Measurement of high voltage:
(1) When the measured voltage is above 1.61110 volts, a rated resistance input voltage divider box should be used.
(2) The negative terminal of the voltage divider box is connected to the "unknown" negative terminal of the potentiometer, while the other end of the "unknown" potentiometer is selected to be connected to an appropriate terminal of the voltage divider box multiplier (× 500, × 200, × 100, × 20, × 10) based on the measured voltage value and the reading of the upper limit of the potentiometer measurement.
(3) Adjust the working current.
(4) Measure the corresponding voltage drop determined on the voltage divider box.
(5) The reading on the potentiometer multiplied by the multiplier determined on the voltage divider box is equal to the measured voltage value.
6�� Precautions
(1) When measuring high voltage, special attention should be paid to the circuit structure and positive and negative polarity markings of the voltage divider box. The terminals of the measured high voltage and the potential difference meter must not be connected incorrectly.
(2) When measuring voltage, current, and power with a potentiometer, the rotation of each knob in the measuring section should start from the first position and rotate sequentially.
(3) When using a potentiometer with a kit, it is necessary to pay attention to the insulation resistance between the connecting wires, potentiometer, and various parts of the kit, which should not be less than 500 megaohms.
(4) When adjusting the working current of a potentiometer during calibration, it should be done in the order of coarse, medium, and fine.

7�� Maintenance and upkeep
1. If the potentiometer is left unused for a long time, oxidation may occur between the brush and the contact surface, causing poor contact. When using, all rotary switches should be rotated several times to ensure good contact. If the contact between the electric brush and the contact surface is not good, it must be cleaned with gasoline to restore the contact, and then coated with a thin layer of acid free pure Vaseline for protection.
2. Potentiometers should not be subjected to strong vibrations and impacts. It should be stored indoors at a temperature of+15 ��~+30 ��, with a relative humidity below 80% and no corrosive gases.
3. The potentiometer should be regularly calibrated at least once a year.

[voltmeter]FMFA Student type (high) potential difference meter

2026-6-15 21:43:52

FMFA Student (High) Potentiometer:

Measurement or adjustment range: * 0.1 range: 0~21.10mV * 1 range: 0~211.0mV * 10 range: 0~2.110V
Minimum step: 1mV 100 �� V 10 �� V
Accuracy: 0.2%
Pool: battery type, with built-in ammeter, battery box, and reference electromotive force
Environment friendly, directly using mains electricity. Comes with a built-in ammeter, working power supply, and reference electromotive force. No chemical pollution.

FMFA Student (High) Potentiometer

[voltmeter]DMC Teaching Combination DC Potentiometer

2026-6-15 21:43:43

Product Description:

Range of indication	Minimum step	accuracy	Scale cm^three	Weight kg
0~2.311110V	1��V	zero point zero one	553118	eight point seven

DMC Teaching Combination DC Potentiometer

[voltmeter]TJ6 type teaching DC potentiometer

2026-6-15 21:43:34

TJ6 type teaching DC potentiometer

Product Description:

measurement range	Minimum step	accuracy	Scale cm^three	Weight kg
0~2.311V	0.5mV	zero point one	272314	two point three

[voltmeter]ZW1605 AC 0.5 level voltmeter

2026-6-15 21:43:26

ZW1605 AC 0.5 level voltmeter

Measurement item: F (45-65) Hz
Input: AC (50-500) V
Accuracy level: Level 0.5
Display: 5 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 48 (H) × 96 (W) × 105 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 300g
RS485 option (ModBus protocol)

[voltmeter]ZW3430B Three phase 0.5 Level Three phase Voltage Meter

2026-6-15 21:43:17

ZW3430B three-phase 0.5 level three-phase voltmeter

Measurement item: AC 3 × U (500V)
Accuracy level: Level 0.5
Display: 4 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 96 (H) × 96 (W) × 100 (D) mm
Opening size Panel Cut Out: 92 × 92mm
Instrument weight NetWeight: �� 900g
RS485 optional (ModBus protocol)

[voltmeter]UT632 Digital AC Millivolt Meter

2026-6-15 21:43:08

Technical specifications of UT632 digital AC millivolt meter

Basic functions	range	Basic accuracy
		1KHz	200Hz��500KHz	10Hz��200Hz, 500KHz��2MHz
AC voltage	4mV	±(1%+15)	±(1%+0.1mV)	±(2%+0.1mV)
	40 mV	±(0.5%+15)	±(3%+20)	±(5%+20)
	400 mV	±(0.5%+15)	±(3%+20)	±(5%+20)
	4V	±(0.5%+15)	±(3%+20)	±(5%+20)
	40V	±(0.5%+15)	±(3%+20)	±(5%+20)
	400V	±(0.5%+15)	±(3%+20)	±(5%+20)
special function
Frequency response range		5Hz��2MHz
Noise voltage		�� 18 words
input impedance		R��10M�� C��47pF
USB data transfer		��
Overload indication		When the voltage is below 8% of the range, it will display "UnderER", Automatically reset to 5% below the range voltage; Display 'OVER' when the voltage exceeds the range by 5%, Display "O.L" when the voltage exceeds the range by 10%.
Selection function		Manual and automatic
dual-channel		��
maximum display		four thousand and forty
General Characteristics
power supply		220V±10% or 110V±10%(50Hz±4%,7VA)
LCD size		157×36mm
working environment		Temperature: 23 ± 5 �� Humidity: �� 60% Atmospheric pressure: 86Kpa to 106 Kpa
body color		red + gray
body weight		3.0Kg
Body dimensions		370×222×106mm
Standard Accessories		Two double clip test cables, three core power cable, software CD, USB transmission cable
standard packaging		Color box, manual, warranty card
Standard packaging quantity		4 units
Standard packaging size		690x455x320mm (0.10 cubic meters)
Gross weight of standard packaging box		21kg

UT632 Digital AC Millivolt Meter

[voltmeter]UT631 Digital AC Millivolt Meter

2026-6-15 21:43:00

Basic functions	range	Basic accuracy
		1KHz	200Hz��500KHz	10Hz��200Hz, 500KHz��2MHz
AC voltage	4mV	±(1%+15)	±(1%+0.1mV)	±(2%+0.1mV)
	40 mV	±(0.5%+15)	±(3%+20)	±(5%+20)
	400 mV	±(0.5%+15)	±(3%+20)	±(5%+20)
	4V	±(0.5%+15)	±(3%+20)	±(5%+20)
	40V	±(0.5%+15)	±(3%+20)	±(5%+20)
	400V	±(0.5%+15)	±(3%+20)	±(5%+20)
special function
Frequency response range		10Hz��2MHz
Noise voltage		�� 18 words
input impedance		R��10M�� C��47pF
Overload indication		When the voltage is below 8% of the range, it will display "UnderER", Automatically reset to 5% below the range voltage; Display 'OVER' when the voltage exceeds the range by 5%, Display "O.L" when the voltage exceeds the range by 10%.
Selection function		Manual and automatic
dual-channel		��
maximum display		four thousand and forty
General Characteristics
power supply		220V±10% or 110V±10%(50Hz±4%,7VA)
LCD size		157×36mm
working environment		Temperature: 23 ± 5 �� Humidity: �� 60% Atmospheric pressure: 86Kpa to 106 Kpa
body color		red + gray
body weight		3.0Kg
Body dimensions		370×222×106mm
Standard Accessories		Two double clip test wires
standard packaging		Color box, manual, warranty card
Standard packaging quantity		4 units
Standard packaging size		690x455x320mm (0.10 cubic meters)
Gross weight of standard packaging box		21kg

UT631 Digital AC Millivolt Meter

[voltmeter]UT622 AC millivolt meter

2026-6-15 21:42:51

Technical specifications of UT622 AC millivolt meter

Technical indicator UT622
Basic functions	range
measure voltage	100��V��300V
	Voltage range (12 levels)	1mV�� 3mV�� 10mV�� 30mV�� 100mV�� 300mV�� 1V�� 3V�� 10V�� 30V�� 100V��300V��
	Decibel range (12 levels)	-60dB�� -50dB�� -40dB�� -30dB�� -20dB�� -10dB�� 0dB��+10dB�� +20dB�� +30dB�� +40dB�� +50dB�� (0dBV=1V, 0dBm=0.775V)
Voltage error	±3%��400Hz��
Power frequency error	50Hz ±4%��20Hz��100kHz ±7%��10Hz��2MHz ±15%
Frequency response range	10Hz��2MHz
Frequency response error	(Based on 400Hz) 20Hz-100Hz ± 3%, 10Hz-2MHz ± 8%
Noise voltage	�� 3% full scale
input impedance	1mV��300mV	Input resistance �� 2M ��, input capacitance �� 50pF.
	1V��300V	Input resistance �� 2M ��, input capacitance �� 20pF.
Monitoring amplifier	Output voltage: 1V ± 5%, frequency response error: 10Hz~2MHz ± 3dB (based on 400Hz).
Overload voltage indication	(1) The peak AC overload voltage for each range from 1mV to 300mV is 100V, and the peak AC overload voltage for each range from 1V to 300V is 660V. (2) The maximum peak DC voltage and AC overload are 660V.
Two channel isolation	��110dB��10Hz��100kHz��
dual-channel	have

General Characteristics
power supply	220V ± 10%, 50Hz ± 4%, power consumption: approximately 5W
working environment	Temperature: 0 ��~+40 ��, humidity �� 80%
body color	Ivory white+gray
body weight	2 kg (net weight)
Body dimensions	125×185×270mm
Standard Accessories	2 transmission lines (UT622), 1 transmission line (UT621)
standard packaging	Color box, instruction manual
Standard packaging quantity	6 units
Standard packaging size	650×370×540 mm
Gross weight of standard packaging box	15kg

UT622 AC Millivolt Meter

[voltmeter]UT621 AC millivolt meter

2026-6-15 21:42:42

UT621 AC Millivolt Meter

Technical indicator UT621
Basic functions	range
measure voltage	100��V��300V
	Voltage range (12 levels)	1mV�� 3mV�� 10mV�� 30mV�� 100mV�� 300mV�� 1V�� 3V�� 10V�� 30V�� 100V��300V��
	Decibel range (12 levels)	-60dB�� -50dB�� -40dB�� -30dB�� -20dB�� -10dB�� 0dB��+10dB�� +20dB�� +30dB�� +40dB�� +50dB�� (0dBV=1V, 0dBm=0.775V)
Voltage error	±3%��400Hz��
Power frequency error	50Hz ±4%��20Hz��100kHz ±7%��10Hz��2MHz ±15%
Frequency response range	10Hz��2MHz
Frequency response error	(Based on 400Hz) 20Hz-100Hz ± 3%, 10Hz-2MHz ± 8%
Noise voltage	�� 3% full scale
input impedance	1mV��300mV	Input resistance �� 2M ��, input capacitance �� 50pF.
	1V��300V	Input resistance �� 2M ��, input capacitance �� 20pF.
Monitoring amplifier	Output voltage: 1V ± 5%, frequency response error: 10Hz~2MHz ± 3dB (based on 400Hz).
Overload voltage indication	(1) The peak AC overload voltage for each range from 1mV to 300mV is 100V, and the peak AC overload voltage for each range from 1V to 300V is 660V. (2) The maximum peak DC voltage and AC overload are 660V.
Two channel isolation
dual-channel

General Characteristics
power supply	220V ± 10%, 50Hz ± 4%, power consumption: approximately 5W
working environment	Temperature: 0 ��~+40 ��, humidity �� 80%
body color	Ivory white+gray
body weight	2 kg (net weight)
Body dimensions	125×185×270mm
Standard Accessories	2 transmission lines (UT622), 1 transmission line (UT621)
standard packaging	Color box, instruction manual
Standard packaging quantity	6 units
Standard packaging size	650×370×540 mm
Gross weight of standard packaging box	15kg

UT621 AC Millivolt Meter

[voltmeter]High voltage digital voltmeter

2026-6-15 21:42:34

YD1940/40A High Voltage Digital Voltage Meter

Features:
41/2-digit digital voltage display
Automatically distinguish AC and DC
High measurement accuracy and stable numerical values
True effective value measurement

Technical parameters:
Test voltage: YD1940 500V-10000V AC/DC
YD1940A 500V-20000V AC/DC
Voltage accuracy: 1%
Input impedance: 1000M ��
Main functions: True RMS measurement, 41/2 digit display indication, AC/DC automatic conversion, high measurement accuracy, stable data
Dimensions: 270 × 110 × 265 (mm)

YD1940/40A High Voltage Digital Voltage Meter

[voltmeter]PZ158D DC digital voltmeter

2026-6-15 21:42:24

Overview
The PZ158D DC digital voltmeter is a high-precision electronic measuring instrument with a single-chip microcomputer technology, which can measure at 4 and a half or 5 and can be freely selected, with a resolution of up to 1 µ V and a measurement speed of up to 50 times per second. Due to the advanced single-chip microcomputer and precise analog-to-digital conversion technology used in the instrument, it can automatically calibrate the zero position and provide effective digital filtering, thereby endowing the instrument with extremely stable zero position, excellent reading linearity, and strong anti-interference ability. This series of instruments adopts a seven digit red LED display. The excellent performance of this instrument can play a significant role in fields such as scientific research, industry, agriculture, and national defense, making it an ideal product to replace the original company PZ8.
This instrument has an RS232C interface output and can be directly connected to a computer with a serial port to form a testing system.

Main technical indicators
Conversion rate: 2 times/second (5 half bits) or 50 times/second (4 half bits);
Measurement with maximum and minimum values;
Measurement range, resolution, and basic error of the product under reference conditions:

model	range	measurement range	resolution	basic error
PZ158D (5 and a half digits)	0.2V	0-0.220000V	1��V	±(0.005%RD+0.0015%FS)
	2V	0-2.20000V	10��V	±(0.005%RD+0.0015%FS)
	20V	0-22.0000V	100��V	±(0.006%RD+0.002%FS)
	200V	0-220.000V	1mV
	1000V	0-1000.00V	10mV
PZ158D (4 and a half digits)	0.2V	0-0.22000V	10��V	±(0.02%RD+0.015%FS)
	2V	0-2.2000V	100��V
	20V	0-22.000V	1mV
	200V	0-220.00V	10mV
	1000V	0-1000.0V	100mV

Dimensions: 88 × 215 × 285mm.

[voltmeter]YJ108D Digital Source Table

2026-6-15 21:42:14

Overview
YJ108D digital source meter is an instrument that combines precision measurement or output of DC voltage. Due to the application of advanced microcomputer and analog-to-digital/digital to analog conversion technology, the use of high-precision operational amplifiers, and advanced negative feedback technology, this instrument is endowed with a measurement function of 6 1/2 reading bits and a voltage resolution of 0.1 �� V, and an output function of 5 reading bits and a voltage resolution of 1 �� V, all with high accuracy.
The instrument is equipped with an RS232 serial interface, which can be connected to a computer to achieve the purpose of programmable instrument functions, range, and reading output.
The instrument uses an 8-bit LED digital tube to display measurement readings and output readings, which are clear and eye-catching.

Main technical indicators

	range	resolution	basic error
measurement function	0.2V	0.1��V	±��0.003%RD+0.0025%FS��
	2V	1��V	±��0.003%RD+0.0006%FS��
	20V	10��V
	200V	100��V
Output function	0.1V	1��V	±��0.01%RD+0.005%FS+20��V��
	1V	10��V
	10V	100��V

When outputting voltage, the maximum output current should not be less than 20mA

Remote control function
Interface name: RS232 serial interface.
Communication protocol: 1-bit start bit (0), 8-bit data bit (low bit first), 1-bit stop bit (1), no parity check, baud rate of 9600.

[voltmeter]PZ90 type panel type AC digital voltmeter

2026-6-15 21:42:05

The PZ90 (4/2 bit) panel type series AC digital voltmeter is a small and popular instrument for 4/2 CMOS large-scale integrated circuits, and its measurement results are displayed using a five digit LED. This meter has the characteristics of small size, low power consumption, high sensitivity, good reliability, excellent performance, strong adaptability, and easy use. When combined with various sensors or converters, it can easily achieve digital measurement of various electrical and non electrical quantities. It is a supporting instrument for various measuring instruments and control consoles.

Technical data

Usage conditions
Environmental temperature: 0-+40 ��;
Relative humidity of the environment: below 80%;
Power supply: 220 ± 22V, 50 ± 1.5Hz;

Specification, measurement range, resolution, and basic error: The basic error of the product under reference conditions should comply with the provisions in the table below.

Table model	range	measurement range	resolution	basic error
Table model	range	measurement range	resolution	50Hz-1kHz	50Hz-500Hz
PZ90/11	200mV	0-199.99mV	10��V	± (0.1% reading+10 words)
PZ90/12	2V	0-1.9999V	100��V
PZ90/13	20V	0-19.999V	1mV
PZ90/14	200V	0-199.99V	10mV		± (0.15% reading+10 words)
PZ90/15	400V	0-400.0V	100mV		± (0.3% reading+10 words)

Measurement speed: 2-3 times/second
Weight: 0.6kg
Dimensions: 48 ´ 110 ´ 112mm
Hole size: 44'95mm

[voltmeter]PZ88 type panel type DC digital voltmeter

2026-6-15 21:41:56

The PZ88 panel type DC digital voltmeter is a small and popular instrument that uses 3 1/2 CMOS large-scale integrated circuits, and its measurement results are displayed using four digit LEDs. This table has the characteristics of small size, low power consumption, high resolution, good reliability, and easy use. It can be easily combined with various sensors or converters to achieve digital measurement of various electrical and non electrical quantities, making it an ideal matching instrument for various measuring instruments and consoles.

Technical characteristics of PZ88 panel type DC digital voltmeter

Terms of Use
Operating temperature: 0 �� -+40 ��
Relative humidity: below 80%
Power supply: 220 ± 10%, frequency 50Hz

Specification, measurement range, resolution, and basic error: The basic error of the product under reference conditions should comply with the provisions in the table below.

model	Corresponding range	measurement range	resolution	basic error
PZ88/1	20mV	0-19.99mV	10µV	±(0.1%RD+0.15%FS)
PZ88/2	200mV	0-199.9mV	100µV	±(0.1%RD+0.15%FS)
PZ88/3	2V	0-1.999V	1mV	±(0.1%RD+0.1%FS)
PZ88/4	20V	0-19.99V	10mV
PZ88/5	200V	0-199.9V	100mV

Measurement speed: 2-3 times/second

Dimensions: 48 × 110 × 112mm

Hole size: 44 × 95mm

[voltmeter]PZ28C type panel type DC digital voltmeter

2026-6-15 21:41:46

The PZ28C panel type DC digital voltmeter is a small and popular instrument that uses a 4 1/2 CMOS large-scale integrated circuit, and its measurement results are displayed using a six digit LED. This meter has the characteristics of small size, low power consumption, high resolution, good reliability, excellent performance, strong adaptability, and easy use. When combined with various sensors or converters, it can easily achieve digital measurement of various electrical and non electrical quantities. It is an ideal supporting instrument for various measuring instruments and control consoles. Among them, PZ28C/4 is designed for specific users.

Technical characteristics of PZ28C panel type DC digital voltmeter

Terms of Use
Environmental temperature: 5-+40 ��;
Relative humidity of the environment: below 80%;
Power supply: 220 ± 22V, 50 ± 1.5Hz;

Range, measurement range, resolution, and fundamental error

model	range	measurement range	resolution	basic error
PZ28C/1	20V	0��19.999V	1mV	±��0.04%RD+0.01%FS��
PZ28C/2	200V	0��199.99V	10mV	±��0.04%RD+0.01%FS��
PZ28C/3	1000V	0��1000.0V	100mV	±��0.04%RD+0.01%FS��
PZ28C/4	20mV	0��19.999mV	1��V	±��0.05%RD+0.015%FS��

Weight: less than 1kg;

Dimensions: 160 × 130 × 70mm;

Hole size: 62 × 122mm;

[voltmeter]PZ158P type panel type DC digital voltmeter

2026-6-15 21:41:37

The PZ158P panel type DC digital voltmeter and ammeter are a series of extensions based on the 5/2 voltmeter. They adopt the �� - �� A/D conversion principle and have the characteristics of high measurement accuracy, digital filtering, fast averaging, and automatic calibration. The instrument display adopts a seven digit LED display, which can easily achieve digital measurement of various electric and non electric quantities. It is an ideal matching instrument for various measuring instruments and consoles. Users can also choose to have an RS232 interface.

Product Features
This series of instruments has two types: DC voltmeter and DC ammeter
Panel button calibration, can achieve closed shell calibration
Panel button zeroing function
Equipped with RS232 calibration interface, capable of communicating with computers
Measurement speed: 2 times/second
Dimensions: 48 ´ 110 ´ 112mm
Hole size: 44 × 95mm
Weight: 0.8Kg

Technical data

Usage conditions
Environmental temperature: 0-+40 ��
Relative humidity of the environment: below 80%
Power supply: 220 ± 22V, 50 ± 1.5Hz

The specifications, measurement range, resolution, and basic error comply with the provisions in the table below.

DC voltmeter

model	range	measurement range	resolution	Basic error
PZ158P/01,11	200mV	0~220.000mV	1��V	±(0.005%RD+0.002%FS)
PZ158P/02,12	2V	0~2.20000V	10��V	±(0.005%RD+0.0015%FS)
PZ158P/03,13	20V	0~22.0000V	100��V	±(0.006%RD+0.002%FS)
PZ158P/04,14	200V	0~220.000V	1mV
PZ158P/05,15	400V	0~440.000V	10mV

DC ammeter

model	range	measurement range	resolution	Basic error
PZ158P/21,31	20��A	0~22.0000��A	0.1nA	±(0.01%RD+0.003%FS)
PZ158P/22,32	200��A	0~220.000��A	1nA
PZ158P/23,33	2mA	0~2.20000mA	10nA
PZ158P/24,34	20mA	0~22.0000mA	100nA
PZ158P/25,35	200mA	0~220.000mA	1��A	±(0.02%RD+0.003%FS)
PZ158P/26,36	2A	0~2.20000A	10��A	±(0.02%RD+0.003%FS)

[voltmeter]PF42 type panel type multi-channel DC digital voltmeter

2026-6-15 21:41:25

The PF42 panel type multi-channel DC digital voltmeter adopts a small instrument with 3 and a half bit CMOS large-scale integrated circuit, which can manually, automatically, and remotely perform cyclic testing on four measured signals. The measurement results are displayed with a 4-digit LED (red). This meter has the characteristics of small size, low power consumption, high reliability, excellent performance, strong adaptability, and easy use. When combined with various sensors or converters, it can easily achieve multi-channel digital measurement of various electrical and non electrical quantities. It is a supporting instrument for various measuring instruments and control consoles.

technical performance

model	range	measurement range	resolution	basic error
PF42/1	20mV	0��19.99mV	10��V	±��0.2%RD+0.15%FS��
PF42/2	200mV	0��199.9mV	100��V	±��0.15%RD+0.1%FS��
PF42/3	2V	0��1.999V	1mV	±��0.1%RD+0.1%FS��

Note: The range can be expanded

Power supply: 220 ± 22V, 50 ± 1.5Hz
Measurement channels: 4 channels
Measurement methods: manual fixed-point measurement, automatic continuous loop measurement, remote control fixed-point measurement

Dimensions: 48 × 110 × 112mm
Hole size: 44 × 95mm
Weight: Approximately 0.6kg

[voltmeter]UJ34D High Resistance Laboratory Type DC Potentiometer

2026-6-15 21:41:16

The UJ34D high resistance laboratory type DC potential difference meter is equipped with a built-in zero pointer and a stabilized working power supply, as well as external zero pointer and working power supply terminals. It is easy to use and is the most ideal precision measuring instrument for industrial and mining, scientific research and measurement units, and laboratories. It can be used for precise measurement of DC electromotive force and DC voltage with an accuracy of 0.01. With the help of standard resistors, precise measurements of current and resistance can also be made. Other indirect measurement methods can be used to obtain non electric parameters such as temperature, pH value, pressure, etc. Measurement of high voltage; After being equipped with a voltage divider box, the voltage limit can be extended to 600V. It is used to verify the thermoelectric potential of thermocouples and electronic potentiometers.

technical indicators
Effective range: 0-2.111110V
Minimum resolution: 1 µ V
Accuracy level: 0.01
Working power supply: 1.5V, 5 No.1 batteries
Zero pointer power supply: 9V (2 6F22 stacked batteries)
Dimensions: 483 (L) × 283 (W) × 158 (H) (mm)
Weight: 7.8kg

[voltmeter]PZ158A DC digital voltmeter

2026-6-15 21:41:07

Product Description
The PZ158A series DC digital voltmeter has a 6 1/2 bit display and can measure DC voltages ranging from 0.1 µ V to 1000V. Due to the use of microprocessors and pulse width modulation analog-to-digital conversion technology, automatic zero calibration, digital analog filtering and other technologies, this meter is endowed with extremely stable zero position and good linearity and anti-interference ability. It also has an RS232C interface, which can be easily connected to computer systems to form a data acquisition system. Adopting an eight bit VFD or LED display, PZ158A/1 is a single range (0.2V) VFD display with clear readings and soft light colors, suitable for use in various fields such as scientific research, industry, and national defense.

technical indicators
Basic error:
0.2V range ± (0.003% RD+0.0025% FS)
2V range ± (0.002% RD+0.0005% FS)
Range of 20V, 200V, 1000V ± (0.0025% RD+0.0006% FS)
Maximum display modulus: 2200000
Environmental temperature: 5-40 ��
Relative humidity: 20-80%
Power supply: 220V 50Hz
Measurement speed: 1.2 times/second
Dimensions: 88 × 235 × 360mm
Weight:<3.5kg

[voltmeter]EM2182 type dual channel 2MHz digital intelligent AC millivolt meter

2026-6-15 21:40:58

EM2182 Dual Channel 2MHz Digital Intelligent AC Millivolt Meter

The microprocessor controls the fully automatic and intelligent measurement of the measured signal.
The measurement process does not require manual operation, and there is no need to worry about improper settings causing malfunction or equipment damage.

Performance characteristics
LCD display amplitude

Decibel value.

Technical indicators
Measurement voltage range: 100 µ V-300V Maximum input voltage: ACp-p+DC �� 660Vp-p
Frequency range of measurement signal: 10Hz-2MHz
Voltage error under reference conditions: ± 3%
Frequency response error under reference conditions: 30Hz-100kHz ± 3%
10Hz-2MHz ±8%
Input impedance: Input resistance �� 1M �� Input capacitance �� 50pF
Channel isolation: �� 100dB (10Hz-100kHz)
Trigger signal output: 0.5V-6V
Dimensions: 210mm × 82mm × 230mm Weight: Approximately 1.5kg
Power supply voltage: 220V ± 10% apparent power: approximately 5VA
Automatic measurement and LCD display of voltage values Decibel value

EM2182 Dual Channel 2MHz Digital Intelligent AC Millivolt Meter

[voltmeter]EM2181 Type 2MHz Digital Intelligent AC Millivolt Meter

2026-6-15 21:40:49

Performance Characteristics of EM2181 2MHz Digital Intelligent AC Millivolt Meter
LCD display amplitude and decibel value.

technical indicators

Measurement voltage range: 100 µ V-300V Maximum input voltage: ACp-p+DC �� 660Vp-p
Frequency range of measurement signal: 10Hz-2MHz
Voltage error under reference conditions: ± 3%
Frequency response error under reference conditions: 30Hz-100kHz ± 3%
10Hz-2MHz ±8%
Input impedance: Input resistance �� 1M �� Input capacitance �� 50pF
Trigger signal output: 0.5V-6V
Dimensions: 210mm × 82mm × 230mm Weight: Approximately 1.5kg
Power supply voltage: 220V ± 10% apparent power: approximately 5VA
Automatic measurement and LCD display of voltage values Decibel value

EM2181 2MHz Digital Intelligent AC Millivolt Meter

[voltmeter]EM2172 type dual channel 2MHz AC millivolt meter

2026-6-15 21:40:40

Performance characteristics
The EM2172 dual channel 2MHz AC millivolt meter has an automatic balancing protection circuit, which does not turn on the meter when turned on. This function is currently exclusive in China.

technical indicators

Voltage measurement range: 100uV~300V ACp-p+DC �� 660Vp-p
Frequency range for measuring voltage: 10Hz-2MHz
Voltage error under reference conditions: ± 3% (400Hz)
Frequency response error under reference conditions: (based on 400Hz)
20Hz-100kHz error ��± 3%
10Hz-2MHz error ��± 8%
Input impedance: 1mV-300Mv Input resistance �� 2M �� Input capacitance �� 50PF
1V-300V input resistance �� 8M �� input capacitance �� 20PF
The noise voltage is less than 3% of the full scale
Two channel isolation: �� 110dB (10Hz-100kHz)
Power supply: 220V ± 10% 50Hz ± 4% apparent power: approximately 5VA
Dimensions: 125 × 185 × 270mm Weight: Approximately 1.5kg

[voltmeter]EM2171 Type 2MHz AC Millivolt Meter

2026-6-15 21:40:31

Performance characteristics
The product has an automatic balancing protection circuit, which does not turn on the meter when turned on. This function is currently exclusive in China.

technical indicators
Voltage measurement range: 100uV~300V ACp-p+DC �� 660Vp-p
Frequency range for measuring voltage: 10Hz-2MHz
Voltage error under reference conditions: ± 3% (400Hz)
Frequency response error under reference conditions: (based on 400Hz)
20Hz-100kHz error ��± 3%
10Hz-2MHz error ��± 8%
Input impedance: 1mV-300Mv Input resistance �� 2M �� Input capacitance �� 50PF
1V-300V input resistance �� 8M �� input capacitance �� 20PF
The noise voltage is less than 3% of the full scale
Power supply: 220V ± 10% 50Hz ± 4% apparent power: approximately 5VA
Dimensions: 125 × 185 × 270mm Weight: Approximately 1.5kg

[voltmeter]DP4-V Four and a half digit voltmeter

2026-6-15 21:40:22

DP4-V four and a half digit digital voltmeter

Model: DP4-AV, DV
Working power supply: AC220V, AC24V, AC110V, DC5V, DC12V, DC24V optional

Basic range: DC/AC 200mV-600V (direct input)

Display font height: 0.56��
Display mode: Red and blue LED optional
Maximum display: ± 19999
Accuracy: ± (0.2%+2 words)
Dimensions: 48 × 96 × 60 (mm)
Hole size: 45 × 92 (mm)

Product Features:
The DP4-V four and a half digit voltmeter adopts a delicate and beautiful fully enclosed housing, embedded installation, and strong anti-interference ability

[voltmeter]DP3-V Three and a half digit voltmeter

2026-6-15 21:40:13

DP3-V three and a half digit digital voltmeter

Model: DP3-AV, DV

Working power supply: AC220V, AC24V, AC110V, DC5V, DC12V, DC24V optional
Basic range: DC/AC 200mV-600V (direct input)
Display font height: 0.56��
Display mode: Red and blue LED optional
Maximum display: ± 1999
Accuracy: ± (0.2%+2 words)
Dimensions: 48 × 96 × 60 (mm)
Hole size: 45 × 92 (mm)
Product features: Exquisite and beautiful fully enclosed shell, embedded installation, strong anti-interference, panel zero position adjustable,

[voltmeter]Non contact AC voltage detection pen

2026-6-15 21:40:04

CD-1/CD-2 non-contact AC voltage detection pen

CD-1/CD-2
CD-1: Non contact 90V~600V AC voltage measuring pen
CD-2: Non contact 24V~600V AC voltage measuring pen

Suitable for 50/60Hz circuits
Overvoltage protection level: CATIII 600V
Size Size: 159 × 22mm
Power supply: AAA 1.5V × 2
Weight: Approximately 41g (including battery)

[voltmeter]Intermediate frequency AC/DC voltmeter

2026-6-15 21:39:56

T63-V medium frequency AC/DC voltmeter

Model: T63-V
Product: Medium frequency AC/DC voltmeter

Main technical indicators:

Limit: 0-50-100V 0-75-150V 0-125-250V 0-150-300V 0-300-600V
Number of dials: 150
Level 0.5

Dimensions: 210x152x90mm

Characteristics and uses of T63-V medium frequency AC/DC voltmeter:
The length of the tensioning mechanism instrument and ruler is 110mm, the weight is �� 2kg, the working frequency is 45-65Hz, 90-1500Hz, and the product can be used as a standard meter to replace T19, T22, T10, T15, T29, T32, D26, T80

[voltmeter]T77 electromagnetic AC/DC voltmeter

2026-6-15 21:39:47

T77 electromagnetic AC/DC voltmeter

Model: T77-V
Product: AC/DC voltmeter

Main technical indicators:
Rated voltage (V): 0-1.5-3-7.5V 0-7.5-15-30-60V
Number of dials: 150
Level 0.5

Model: T77-V
Product: AC/DC voltmeter

Main technical specifications of T77 electromagnetic AC/DC voltmeter:

Rated voltage (V): 0-75-150-300-600V
Number of dials: 150
Level 0.5

Dimensions: 210x152x90mm
Features and uses: Tensioning mechanism instrument, aluminum pointer, ruler length 135mm, weight �� 2kg, working frequency 45-65Hz, product can be used as a standard meter
replaceable T19��T22��T10��T15��T29��T32��D26��T81��T75��T56��T31��T55��T21��T23

[voltmeter]T51-V AC/DC voltmeter

2026-6-15 21:39:38

T51-V type AC/DC voltmeter

Model: T51-V
Product: AC/DC voltmeter

Main technical indicators:

Rated voltage (V): 0-1.5-3-7.5V 0-7.5-15-30-60V 0-75-150-300-600V
Number of dials: 150

Overall dimensions:
210x152x90mm

Characteristics and uses of T51-V AC/DC voltmeter:

Wire tensioning mechanism instrument, ruler length 110mm, weight �� 2kg, working frequency 45-65Hz, product can be used as a standard meter, original T2 type instrument
replaceable T19��T22��T10��T15��T29��T32��D26��T81��T75��T56��T31��T55��T21��T23

[voltmeter]C79-mV-V DC millivolt meter

2026-6-15 21:39:29

Model: C79-V/1-2
Product: DC voltmeter

Main technical specifications of C79-mV-V DC millivolt meter:
Limit: 0-44.84mV-74.88mV -3-7.5-15-30-75-150-300-600V

Dimensions: 290x200x120mm can replace C41

Characteristics and Applications of C79-mV-V DC Millivolt Meter:
The length of the gauge of the wire structure instrument is 160mm, the weight is �� 4kg, the instrument weight limit consumes 1mA of current, and the original C4 type instrument
C79/1 is at level 0.5
C79/2 is at level 0.2

[voltmeter]C77-mV-V type multi limit millivolt meter

2026-6-15 21:39:21

Model: C77mV
Product: DC Millivolt Meter

Main indicators:
Limit mv: 0-12-30-60mV. 0-45-75-150mV. 0-120-300-600mV. 0-30-60-120-300-600mV

Number of dials: 120 one hundred and fifty

Model: C77V
Product: DC voltmeter

Main indicators:

Limit V: 0-1.2-3-6V. 0-1.2-3-6-12-30V. 0-12-30-60V. 0-120-300-600V
0-30-60-120-300-600V
0-0.012-0.03-0.06-0.12-0.3-0.6-1.2-3-6-12-30-60-120-300-600V.
0-0.045-0.075-1.5-3-7.5-15-30-75-150-300-600V

Number of dials: 120 one hundred and fifty
Features and uses: Wire structure instrument, with a scale length of 110mm and a weight not exceeding 2kg. It can be used as a standard meter and has been rated as a provincial excellent product. The outer dimensions are 210 * 152 * 190mm. Can be replaced by C19, C21, C33, C29, C31, C36, C38, C42, C46, C59, C63, C80 model instruments

[voltmeter]C65-mV-V type multi limit millivolt meter

2026-6-15 21:39:12

Model: C65mV

Product: DC Millivolt Meter

Main indicators:

Limit mv: 0-12-30-60mV. 0-45-75-150mV. 0-120-300-600mV. 0-30-60-120-300-600mV

Number of dials: 120 one hundred and fifty

Model: C65V

Main indicators:

Limit V: 0-1.2-3-6V. 0-1.2-3-6-12-30V. 0-12-30-60V. 0-120-300-600V
0-30-60-120-300-600V
0-0.012-0.03-0.06-0.12-0.3-0.6-1.2-3-6-12-30-60-120-300-600V.
0-0.045-0.075-1.5-3-7.5-15-30-75-150-300-600V

Number of dials: 120 one hundred and fifty

Characteristics and Applications:
Zhangsi structure instrument, with a scale length of 110mm and a weight not exceeding 2kg. It can be used as a standard meter and has been rated as a provincial excellent product. The external dimensions are 210 * 152 * 190mm. It can be replaced by C19, C21, C33, C29, C31, C36, C38, C42, C46, C59, C63, C80 model instruments

[voltmeter]C64-V DC voltmeter

2026-6-15 21:39:03

Model: C64-V
Product: DC voltmeter

Main technical indicators:

Limit: 0-30-45-75mV-0.15-0.3-0.75-1.5-3-7.5-15-30-75-150-300-600V
Number of dials: 150
Level 0.2

Overall dimensions:
290x200x120mm

Characteristics and Applications:
The length of the gauge for the wire structure instrument is 160mm, with a weight of �� 4kg. The instrument has multiple measurement limits, high sensitivity, and a voltage limit that consumes 1mA of current, which can replace C41

[voltmeter]L7/5-A-MA AC Ampere Meter

2026-6-15 21:38:54

Model: L7/5-A-MA

Product: AC Ampere Meter

Main technical indicators:
Quantity limit: 0-0.5-1A/0-1-2A/0-2.5-5A/0-5-10A
Number of dials: 100

Quantity limit: 0-100-200mA/0-200-500mA/0-500-1000mA
Number of dials: 100

Level 1.0

Dimensions: 210x152x90mm
Features and Applications: The working frequency is 50Hz, and special limit instruments can be produced according to user requirements

[voltmeter]L7-V/4 RMS voltmeter

2026-6-15 21:38:46

L7-V/4 effective value voltmeter

Model: L7-V/4

Product: Effective Value Volt Meter
Main technical indicators:
Limit: 0-2.4-3.6-36-12-36-60-120-240-480-600V
Number of dials: 100
Level 1.0

Dimensions: 210x152x90mm

Characteristics and uses of L7-V/4 effective value voltmeter:
Scale length 110mm, operating frequency 45-2kHz

[voltmeter]L7-V/2 Average Value Voltmeter

2026-6-15 21:38:36

Model: L7-V/2
Product: Average Value Volt Meter

Main technical indicators:

Quantity limit: 0-20-50-100-200-500V
Number of dials: 100
Level 1.0

Dimensions: Can replace L2 type instruments

Characteristics and Applications:
Scale length 110mm, operating frequency 45-2kHz

[voltmeter]L7-V/1 type average voltmeter

2026-6-15 21:38:24

Model: L7-V/1

Product: Average Value Volt Meter

Main technical indicators:
Limit: 0-12-24-26-36-48-60-120V
Number of dials: 100
Level 1.0

Dimensions: Can replace L2 type instruments

Characteristics and Applications:
Scale length 110mm, operating frequency 45-2kHz

[voltmeter]D8-V Type 0.5 Class AC/DC voltmeter

2026-6-15 21:38:15

D8-V 0.5-level AC/DC voltmeter

Model: D8-V
Product: AC/DC voltmeter

Main technical indicators:

Limit: 0-1.5-3-7.5V 0-7.5-15-30-60V 0-75-150-300-600V
Number of dials: 150
Level 0.5

Dimensions: 232x289x172mm

Characteristics and uses of D8-V 0.5-level AC/DC voltmeter:

The cursor of the tensioning mechanism indicates a low consumption ruler with a length of 150mm, a weight of �� 8kg, and a working frequency of 50-1500HZ for wattmeters and 50HZ for milliammeters and voltmeters. It can measure low-power electrical parameters and can replace the D39 type

[voltmeter]D4-V Type 0.1 Class Electric System AC/DC Voltmeter

2026-6-15 21:38:07

D4-V 0.1 level electric series AC/DC voltmeter

Model: D4-V

Product: AC/DC voltmeter

Main technical indicators:
Limit: 0-150-300V
Working frequency: 45-65-400HZ
Number of dials: 150
0.1 level

Overall dimensions:
The cursor indicator 365x350x165 can replace the T30/D50 instrument panel

Characteristics and Applications:
The D4-V 0.1 level electric series AC/DC voltmeter adopts a tension spring structure, with a cursor length of 550mm and a cursor scale weight of 12kg

[voltmeter]D76-V AC/DC voltmeter

2026-6-15 21:37:58

Model: D76-V
Product: AC/DC Ampere Meter

Main technical specifications of D76-V AC/DC voltmeter:

Quantity limit: 0-75-150-300V
Working frequency: 45-65Hz
Number of dials: 150
Level 0.2

Dimensions: 360x350x136mm can replace D40 and T24 instruments

Characteristics and Applications:
The shaft tip support can be used as a standard gauge instead of the original D2W instrument with a ruler length of 280mm and a vernier scale weight �� 11kg.

[voltmeter]PZ91 type panel type DC digital voltmeter

2026-6-15 21:37:49

1�� Overview

The PZ91 panel type DC digital voltmeter is a small panel type instrument using 41/2CMOS large-scale integrated circuits, and its measurement results are displayed using five digit LEDs.

2�� Main technical indicators

model	Corresponding range	measurement range	sensitivity	basic error
PZ91/1	200mV	0-199.99mV	10��V	±(0.04%RD+0.01%FS)
PZ91/2	2V	0-1.9999V	100��V	±(0.03%RD+0.01%FS)
PZ91/3	20V	0-19.999V	1mV	±(0.04%RD+0.01%FS)
PZ91/4	200V	0-199.99V	10mV	±(0.04%RD+0.01%FS)
PZ91/5	400V	0-400.0V	100mV	±(0.05%RD+0.015%FS)
PZ91/6	20mV	0-19.999mV	1��V	±(0.05%RD+0.015%FS)

Measurement speed: 2-3 times/second External dimensions: 48 × 110 × 112mm

Hole size: 44 × 95mm

[voltmeter]PZ158A series DC digital voltmeter

2026-6-15 21:37:40

1�� Overview

The PZ158A series DC digital voltmeter has a 61/2-digit display and can measure DC voltages ranging from 0.1 �� V to 1000V. This table also comes with an RS232C interface and displays using an eight bit VFD fluorescent digital tube or LED display, with PZ158A/1 being a single range (0.2V) VFD display.

2�� Main technical indicators

(1) Measurement speed: 1.2 times/second
(2) Basic error: 0.2V Range: ± (0.003% RD+0.0025% FS)
2V range: ± (0.002% RD+0.0006% FS)
Range of 20V, 200V, 1000V: ± (0.0025% RD+0.0008% FS)
(3) Maximum display modulus: 2200000
(4) Dimensions: 88 × 235 × 360m

[voltmeter]HB436V/HB439V Intelligent three-phase voltmeter

2026-6-15 21:37:31

HB436V/HB439V intelligent three-phase voltmeter

1�� Characteristics
Simultaneously input three-phase voltage and display the measured three-phase voltage in three rows simultaneously
According to the voltage transformer used, the range display can be set arbitrarily
Two relay upper and lower limit alarms, alarm range can be set arbitrarily

2�� Technical parameters

1. Working power supply: AC/DC85-260V (other voltages can be customized)
2. Input range: AC0-500V; AC0��100V
3. Extended range: 0-9999KV (with voltage transformer)
4. Response frequency: 50Hz or 60Hz
5. Sampling period: 0.5 seconds
6. Maximum overload: 10A for one minute
7. Display range: -1999 to 9999
8. Display resolution: 0.001A
9. Basic error: 0.5% ± 2 words
10. Input impedance: 0.02 ��
11. Contact capacity: AC220V/3A
12. Display digital tube: 436:3 rows of red 0.56-inch LED
439:3 rows of red 0.8-inch LEDs
13. Working environment: 0-50 ��; �� 85% RH III. Model Description

HB436V/HB439V intelligent three-phase voltmeter

[voltmeter]HB40X series intelligent AC/DC voltmeter

2026-6-15 21:37:22

HB40X series intelligent AC/DC voltmeter

1�� Characteristics
Compatible input of AC current and DC current signals
AC: 500V��DV100V��DV10V��DV1V
DC: 500V��AV100V��AV10V��AV1V
Zero value, full value, and decimal point can be freely set
Multi level digital filtering selection effectively eliminates critical skip words
Two relay alarm outputs, with alarm values set arbitrarily
Simulate current and voltage transmission output, with adjustable transmission range

2�� Technical parameters
1. Working power supply: AC/DC85-260V (other voltages can be customized)
2. Measurement method: True RMS measurement
3. Input signals: DV500V, 100V, 10V, 1V
AV500V��100V��10V��1V
4. DC voltage display range: -1999 to 9999
5. AC voltage display range: 0-9999
6. DC voltage measurement accuracy: ± (0.8%+3 words)
7. AC voltage measurement accuracy: ± (1.0%+5 words)
8. Over limit display: "EEEE" or "- EEEE
9. Overload range: 800V for 1 minute
10. Transmission output signal: 4-20mA, 0-20mA
11. Transmission output accuracy: ± 1%+FS
12. Transmission load: not less than 500 ��
13. Relay output: 2-channel relay normally open and normally closed output
14. Contact capacity: AC220V/3A
15. Working environment: 0-50 ��; ��85��RH

3�� Model Description

[voltmeter]HB4740/HB5740 Intelligent AC/DC voltmeter

2026-6-15 21:37:13

Characteristics of HB4740/HB5740 Intelligent AC/DC Voltage Meter

Compatible input of AC voltage and DC voltage signals
AC: 500V��AC100V��AC10V��AC1V
DC: 500V��DC100V��DC10V��DC1V
Zero value, full value, and decimal point can be freely set
Multi level digital filtering is available for selection, effectively filtering out interference
Two relay alarms, analog current and voltage transmission output

Technical parameters of HB4740/HB5740 intelligent AC/DC voltmeter
1. Working power supply: AC/DC85-260V (other voltages can be customized)
2. Display size: HB4740: 0.80 inches; HB5740: 0.56 inches
3. Over limit display: "EEEE" or "- EEE"
4. Contact capacity: Two relays with normally open and normally closed outputs of AC250/3A
5. Contact life: 105 times
6. Transmission output: 4-20mA, 0-20mA
7. Transmission load: not less than 500 ��
8. DC voltage display range: -1999 to 9999
9. AC voltage display range: 0-9999
10. DC voltage measurement accuracy: ± (0.8%+3 words)
11. AC voltage measurement accuracy: ± (1.0%+5 words)
12. Working environment: 0-50 ��; ��85��RH

Model Description

[voltmeter]AC/DC current and voltage meter

2026-6-15 21:37:04

HB4735/HB5735B AC/DC current and voltage meter

1�� Characteristics
The range can be calibrated, the decimal point position can be adjusted, effectively eliminating critical jumping and displaying more stably
The product has reliable quality, stable performance, strong anti-interference ability, and can be used in harsh environments

2�� Technical parameters
1. Working power supply: AC220V ± 15% 50HZ (other power supplies can be customized)
2. Display range: -1999 to 1999
3. Display size: 0.56 inch red LED
4. Sampling rate: 3 times/second
5. Working environment: 0-50 ��; ��85��RH
6. Insulation resistance: 100M ��

7. Dimensions: HB4735: 96 × 48 × 112
HB5735B:79×43×52
8. Hole size: HB4735:92 × 44
HB5735B:76×39.5

[voltmeter]CD194U series intelligent three-phase voltmeter

2026-6-15 21:36:55

Panel size: 72X72mm
Installation hole size: 67X67mm
Display: Single row LED display, adjustable brightness
Function description: Measure and display three-phase voltage;
Optional alarm output, transmission output, RS485 communication;
Support key programming to set various parameters;

Technical specifications of CD194U series intelligent three-phase voltmeter

Performance category	Parameters
accuracy class	Level 0.2, Level 0.5
Display	Three rows of 4-digit LED display with adjustable brightness
Nominal input	Voltage: AC 100V, 220V, 380V; Current: AC 1A, 5A
input impedance	Voltage>1M ��, current<20m ��
operating frequency	50/60Hz±10%
overload capacity	Duration: 1.2 times instantaneous: voltage 2 times (1 second), current 10 times (5 seconds)
Whole meter power consumption	<2.5VA
working power supply	AC110/220/380v��AC/DC 80V~260V
contact method	RS-485 interface, MODBUS-RTU protocol
alarm output	2-channel relay output
transmitter output	4~20mA //0~20mA
working conditions	Environmental temperature -10~55 ��, relative humidity �� 93%, non corrosive gas environment, altitude �� 2500m
insulation resistance	��100M��

[voltmeter]CD194U series intelligent single-phase voltmeter

2026-6-15 21:36:46

Panel size: 96X96mm
Installation hole size: 92X92mm
Display: Single row LED display, adjustable brightness
Function description: Measure and display single-phase voltage;
Optional alarm output, transmission output, RS485 communication;
Support key programming to set various parameters;

Technical specifications of CD194U series intelligent single-phase voltmeter

Performance category	Parameters
accuracy class	Level 0.2, Level 0.5
Display	4-digit LED display with adjustable brightness
Nominal input	Voltage: AC 100V 220V 380V; Current: AC 1A, 5A
input impedance	Voltage>1M ��, current<20m ��
operating frequency	50/60Hz±10%
overload capacity	Duration: 1.2 times instantaneous: voltage 2 times (1 second), current 10 times (5 seconds)
Whole meter power consumption	<1.5VA
working power supply	AC110/220/380v��AC/DC 80V~260V
contact method	RS-485 interface, MODBUS-RTU protocol
alarm output	2-channel relay output
transmitter output	4~20mA //0~20mA
working conditions	Environmental temperature -10~55 ��, relative humidity �� 93%, non corrosive gas environment, altitude �� 2500m
insulation resistance	��100M��

[voltmeter]ZW1601 AC 0.5 level voltmeter

2026-6-15 21:36:38

ZW1601 AC 0.5 level voltmeter

Measurement item: AC (10-500V)
Accuracy level: Level 0.5
Display: 5 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 48 (H) × 96 (W) × 105 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 300g

RS485 option (ModBus protocol)

[voltmeter]ZW1618 AC/DC 0.5 level voltmeter

2026-6-15 21:36:28

ZW1618 AC/DC 0.5 level voltmeter

Measurement item: AC (10-500V)
Accuracy level: Level 0.5
Display: 5 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 48 (H) × 96 (W) × 105 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 300g
RS485 option (ModBus protocol)

[voltmeter]ZW3430 Three phase AC 0.5 level voltmeter

2026-6-15 21:36:20

ZW3430 three-phase AC 0.5 level voltmeter

Measurement item: AC 3 × V (600V)
Accuracy level: 0.5 level 0
Display: 4 digits, 0.5 "LED
Power Supply: AC220V ± 10%/AC100V ± 10% (optional)
Instrument dimensions: 96 (H) × 96 (W) × 124 (D) mm
Opening size Panel Cut Out: 90 × 90mm
Instrument weight NetWeight: �� 600g
RS485 option (ModBus protocol)

[voltmeter]ZW5430 Three phase AC 0.5 level voltmeter

2026-6-15 21:36:04

ZW5430 three-phase AC 0.5 level voltmeter

Measurement item: AC 3 × V (600V)
Accuracy level: Level 0.5
Display: 4 digits, 0.5 "LED
Power Supply: AC220V ± 10%/AC100V ± 10% (optional)
Instrument dimensions: 80 (H) × 160 (W) × 130 (D) mm
Opening size Panel Cut Out: 150 × 75mm
Instrument weight NetWeight: �� 600g
RS485 option (ModBus protocol)

[voltmeter]ZW1418 AC/DC 0.5 level voltmeter

2026-6-15 21:35:55

ZW1418 AC/DC 0.5 level voltmeter

Measurement item: AC/DC (600V)
Accuracy level: Level 0.5
Display: 4 digits, 0.5 "LED
Power Supply: AC220V ± 10%/AC100V ± 10% (optional)
Instrument dimensions: 48 (H) × 96 (W) × 112 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 340g
RS485 option (ModBus protocol)

[voltmeter]ZW5401 AC 0.5 level voltmeter

2026-6-15 21:35:39

ZW5401 AC 0.5 level voltmeter

Measurement item: AC (600V)
Accuracy level: Level 0.5
Display: 4 digits, 0.8 "LED
Power Supply: AC220V ± 10%/AC100V ± 10% (optional)
Instrument dimensions: 80 (H) × 160 (W) × 124 (D) mm
Opening size Panel Cut Out: 150 × 75mm
Instrument weight NetWeight: �� 600g
RS485 option (ModBus protocol)

[voltmeter]ZW1401 AC 0.5 level voltmeter

2026-6-15 21:35:31

ZW1401 AC 0.5 level voltmeter

Measurement item: AC (600V)
Accuracy level: Level 0.5
Display: 4 digits, 0.5 "LED
Power Supply: AC220V ± 10%/AC100V ± 10% (optional)
Instrument dimensions: 48 (H) × 96 (W) × 112 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 340g
RS485 option (ModBus protocol)

[voltmeter]ZW1658 AC/DC 0.2 level voltmeter

2026-6-15 21:35:22

ZW1658 AC/DC 0.2 level voltmeter

Measurement item: AC (10-500V)
Accuracy level: 0.2
Display: 5 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 48 (H) × 96 (W) × 105 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 300g

RS485 option (ModBus protocol)

[voltmeter]ZW1651 AC 0.2 level voltmeter

2026-6-15 21:35:12

ZW1651 AC 0.2 level voltmeter

Measurement item: AC (10-500V)
Accuracy level: 0.2
Display: 5 digits, 0.5 "LED
Power Supply: AC (85V-265V)
Instrument dimensions: 48 (H) × 96 (W) × 105 (D) mm
Opening size Panel Cut Out: 44 × 91mm
Instrument weight NetWeight: �� 300g

RS485 option (ModBus protocol)

[voltmeter]D9-V AC medium frequency voltmeter

2026-6-15 21:35:03

Specification and main technical parameters of electric AC/DC meters

Medium frequency voltmeter level 0.5	D9V-1	0-15-30V
		0-50-100V
		0-75-150V
		0-125-250V
		0-150-300V
		0-250-500V
		0-300-600V

265×195×135

The D9-V AC intermediate frequency voltmeter is suitable for measuring current and voltage in DC circuits or AC circuits at any frequency between 45-1500 Hz

[voltmeter]T54-V/mV AC/DC Millivolt Meter

2026-6-15 21:34:51

Specification and main technical parameters of electromagnetic AC/DC meters

Low consumption voltmeter level 0.5	T54-V	0-1.5-3-7.5-15-30V	325×240×140	Suitable for measuring AC/DC voltage and current of micro motors, household appliances, and low consumption electrical and low consumption electrical equipment.
		0-30-75-150-300-600V
Low consumption milliampere meter level 0.5	T54-MV	0-1.5-3-6mA
		0-7.5-15-30mA

T54-V/mV AC/DC Millivolt Meter

[voltmeter]T30-V AC/DC voltmeter

2026-6-15 21:34:42

Specification and main technical parameters of electromagnetic AC/DC meters

AC/DC voltmeter level 0.1	T30-V	0-75-150-300-600V
		0-15-30-45-60V

320×240×140

The T30-V AC/DC voltmeter is a portable electric meter with electromagnetic wire support and dual light point indication, used for precise measurement of AC/DC voltage and current in laboratories or as a standard meter in metrology rooms.

[voltmeter]T24-V AC/DC voltmeter

2026-6-15 21:34:33

T24-V AC/DC voltmeter specifications and main technical parameters

AC/DC voltmeter level 0.2	T24-V	0-15-30-45-60V
		0-75-150-300V
		0-150-300-450-600V

320×235×145

T24-V type AC/DC voltmeter is a portable electric meter supported by electromagnetic wires, used for precise measurement of AC/DC voltage and current in laboratories or as a standard meter in metrology rooms.

[voltmeter]T19-V AC/DC voltmeter

2026-6-15 21:34:23

T19-V AC/DC voltmeter specifications and main technical parameters

AC/DC voltmeter level 0.5	T19-V	0-7.5-15V
		0-15-30V
		0-30-60V
		0-7.5-15-30-60V
		0-50-100V
		0-75-150V
		0-150-300V
		0-300-600V
		0-75-150-300-600V

220×170×100

The T19-V type AC/DC voltmeter is used for measuring voltage or current in DC circuits and AC 50Hz circuits.

[voltmeter]C67-V/mV type DC millivolt meter

2026-6-15 21:34:14

Specifications and Main Technical Parameters of C67-V/mV DC Millivolt Meter

C67-mV	0-45mV;0-75mV; 0-100mV;0-200mV;
	0-500mV
C67-V	0-1V; 0-2V; 0-5V; 0-10V; 0-20V;0-50V
	0-100V; 0-200V; 0-500V; 0-600V;

164×143×95

The C67-V/mV DC millivolt meter is used on analytical and electronic instruments to display current, voltage, and various parameters in DC circuits

[voltmeter]C50-V/mV type DC millivolt meter

2026-6-15 21:34:05

C50-V/mV DC Millivolt Meter Specifications and Main Technical Parameters

DC millivolt meter	C50-mV	0-45-75-150-300-750-1500-3000mV
DC voltmeter	C50-V	0-1.5-3-7.5-15-30-75-150-300-600V

325×240×140

The C50-V/mV DC millivolt meter adopts a portable DC meter with double light point indication supported by a tension wire Used as a standard meter in factories, research departments' metrology rooms, and for precision electrical measurements in laboratories

[voltmeter]C41-V/mV type DC millivolt meter

2026-6-15 21:33:56

Specification and Main Technical Parameters of Magnetoelectric DC Meter

DC millivolt meter level 0.2	C41-mV	0-10mV
		0-20mV
		0-45 mV
		0-75mV
		0-100-200-500-1000-2000 mV
DC voltmeter level 0.2	C41-V	0-1.5-3-7.5-15-30=-75-150-300-750V
		0-2-5-10-20-50V
		0-50-100-200-500V

The C41-V/mV DC millivolt meter adopts a wire support and multiple reflection light point indication structure, so the instrument has extremely high sensitivity and consumes very little power. It is particularly suitable for weak current measurement and transistor static parameter testing, as well as for measuring the output millivolts of thermocouples in vacuum furnaces (or hydrogen furnaces)

320×235×120

[voltmeter]C38-mV/uA type DC millivolt microampere meter

2026-6-15 21:33:47

Specification and Main Technical Parameters of Magnetoelectric DC Meter

DC millivolt meter level 0.5	C38-mV/1	0-1-2-5-10-20-50-100-200-500-1000mV
	C38-mV/2	0-1.5-3-7.5-15-30-75-150-300-750-
		1500mV
DC microampere meter level 0.5	C38-mV,��A/1	0-2.5-5-10-20-50mV
		0-25-50-100-200-500��A
	C38-mV,��A/2	0-100-200-500-1000-2000mV
		0-1-2-5-10-20��A

The C38-mV/uV DC millivolt microampere meter adopts a tensioned wire support structure, which improves the sensitivity and service life of the instrument Can be used for measuring current and voltage in DC circuits and as a standard meter on production lines

[voltmeter]C31-V/mV type DC millivolt meter

2026-6-15 21:33:39

C31-V/mV DC Millivolt Meter Specifications and Main Technical Parameters

Current millivolt meter level 0.5	C31-mV	0-10mV
		0-45-75-150-300-750-1500-3000mV
		0-100-200-500-1000mV
		0-75mV/A
		Can be equipped with an external shunt to measure current values
DC voltmeter level 0.5	C31-V	0-0.045-0.075-3-7.5-15-30-75-150-300
		600V
DC voltmeter level 0.5	C31-V	0-1.5-15-150-1500V	220×170×100
		0-2-5-10-20V��0-3-10-30-100V
		0-50-100-200-500V

The C31-V/mV DC millivolt meter is an instrument with splash proof protection performance and certain anti shock performance Suitable for outdoor use for convenience A certain level of shock resistance Suitable for outdoor and onboard use

[voltmeter]C30-V/mV type DC millivolt meter

2026-6-15 21:33:30

Specification and Main Technical Parameters of Magnetoelectric DC Meter

DC millivolt meter level 1.0	C30-mV	75-0-75mV
		0-75-150-300-1500mV
DC voltmeter level 1.0	C30-V	0-3-7.5-15-30V
		0-3-15-150-300V
		0-3-30-150-300V
		0-15-150-300-450V
		0-30-75-150-300V
		0-75-150-300-600V
		0-150-300-450-600V

The C30-V/mV DC millivolt meter is an instrument with splash proof protection performance and certain anti shock performance Suitable for outdoor use for convenience A certain level of shock resistance Suitable for outdoor and onboard use
135×105×57

[voltmeter]C21-V/mV type DC millivolt meter

2026-6-15 21:33:21

Specifications and Main Technical Parameters of C21-V/mV DC Millivolt Meter

DC high-voltage meter level 0.5	C21/1-mV	0-15-30; 0-25-50; 0-50-100; 0-75-150;	214×194×95
		0-150-300; 0-250-500; 0-500-1000;
		0-15-30-60; 0-25-50-100; 0-50-100-200
		0-75-150-300; 0-150-300-600;
		0-250-500-1000; 0-10; 0-25; 0-45; 0-75;
		0-150;
DC voltmeter level 0.5	C21/1-V	0-0.75�� 1.5-3; 0-1.5-3-7.5; 0-2.5-5-10
		0-7.5-15-30; 0-15-30-75; 0-25-50-100;
		0-75-150-300; 0-150-300-600;

The C21-V/mV/uV type DC micro millivolt meter adopts a wire support structure, which can be used for measuring current and voltage in DC circuits, as well as for use as a standard meter on production lines.

[voltmeter]UJ36A Type DC Potentiometer

2026-6-15 21:33:12

Description
The UJ36A DC potential difference meter can be used in laboratories, workshops, and fields, and can conveniently measure DC voltage (or electromotive force) and calibrate various DC millivolt meters and electronic potentiometers using the compensation method principle. If equipped with standard resistors and transition resistors, it can also measure DC resistance and current. It can be used with various temperature measuring thermocouples to quickly and accurately detect temperature, and can calibrate secondary temperature instruments. It is a commonly used measuring tool in thermal measurement. Comes with standard battery and transistor amplification zero indicator.

Main technical performance:

1. Measurement range: 10 �� V~230mV
2. Accuracy: 0.1%
3. Working power supply: 1.5V (4 No. 1 dry batteries); 9V (2 6F22 batteries)
4. Dimensions: 284 × 230 × 160 (mm)
5. Weight: 4.4kg

[voltmeter]WY2288 Digital RF Millivolt Meter/Small Power Meter

2026-6-15 21:33:03

WY2288 is an intelligent digital RF millivolt meter/low-power meter that can measure the effective value and corresponding power value of sine voltage with frequencies ranging from 200Hz to 1500MHz. It adopts the principle of detection amplification and has the characteristics of wide frequency response, low standing wave coefficient, high sensitivity, and high measurement accuracy. As a digital instrument based on CPU control, it realizes automatic range control and remote control function. It is an essential instrument for ultra-high frequency voltage and power testing and measurement in laboratory and workshop production.

Characteristics:
Digital intelligent broadband RF voltmeter/low-power meter
Maximum 11000 digital display voltage value, four digit digital display power value, and dBm
LCD screen displays multiple sets of parameters and dynamic changes simultaneously
Specially designed small voltage measurement calibration: ensuring measurement accuracy of<10mV
Configure coaxial probes to ensure excellent amplitude frequency characteristics from<10mV to 5V (See attached low-level frequency amplitude characteristic curve)
Matching 50 �� and 70 �� can automatically convert

Main technical performance:
1. Voltage measurement range:
1mV��10V, Divided into four levels: 10mV, 100mV, 1V, and 10V The maximum display is 11000 words Choosing a 40dB voltage divider (optional) can reach 300V
2. Measurement power range:
0.1 �� W to 2000mW. Divided into four levels: 2 �� W, 200 �� W, 20mW, and 2000mW, with a maximum display of 2000 words
3. Measurement level range:
-47dBm��+33dBm(50��),-48dBm��+31dBm(75��).
4. Frequency range of measured voltage:
200HZ-1500MHz
5. Inherent error in voltage measurement:
± 1% ± 10 words, 10mV range ± 2% ± 30 words
6. Inherent error in power measurement:
± 3% ± 10 words, 2 �� W range ± 5% ± 30 words
7. Frequency response error:
200Hz-300MHz ��± 5%
300MHz~600MHz ��± 8%
600MHz~1000MHz ��± 12%
1000MHz��1500MHz ��±18%
8. Power supply:
AC220V ± 10%, 50HZ ± 5%
9 Working temperature:
0 ��~40 ��
10. Size/Weight:
280×240×88(L×W×H)MM,4Kg

[voltmeter]WY2282A type ultra-high frequency digital millivolt meter

2026-6-15 21:32:54

WY2282A is an intelligent RF millivolt meter that can measure the effective value and corresponding level value of sine voltage with frequencies ranging from 200Hz to 1500MHz. A digital instrument based on CPU control, with LCD screen menu style display of multiple parameters and dynamic pointer changes, achieving automatic range.

Features:
�� Implement automatic range, display V, dBm, impedance, and dynamic trend changes in a menu style on the LCD screen.
�� 200Hz~1500MHz, operated with only one probe, ultra wide frequency response, wider application range.
Matching system testing levels of 50 �� and 75 ��, with a resolution of 0.01dB.
High reliability keycap style tactile range switch.

Main technical indicators:
1. Measure frequency response:
200Hz~1.5GHz (one probe)
2. Voltage measurement range:
2mV~10V (using a 100:1 voltage divider can reach 300V)
3 Measurement level range:
-45dBm��+33dBm(50��)��-46dBm��+31dBm(75��)
4. Inherent errors in voltage measurement:
± 1% full-scale value ± 10 words
5 input impedance �� 15k �� (100mV range)
6 Input capacitors:
��2.5Pf
7 External dimensions:
240 × 86 × 310 (mm)
8 Weight: 3kg

[voltmeter]WY2282 Ultra high frequency digital millivolt meter (digital RF millivolt meter)

2026-6-15 21:32:46

WY2282 ultra-high frequency digital millivolt meter (digital RF millivolt meter) features:

�� 100Hz~1GHz, operated with only one probe, ultra wide frequency response, wider application range.
�� Automatic range conversion (WY2282A)
�� Large LCD digital display voltage effective value. The highest count is 3999.
Step by step display of dBm value, while simulating the trend of the measured signal change.
�� No need to adjust balance, automatic zeroing, very convenient to operate.
High reliability keycap style tactile range switch.

Main technical indicators:
1. Voltage measurement range:
3mV~10V (using a 100:1 voltage divider can reach 300V)
2. Measurement level range:
-46dBm~+33dBm (50 �� matched load)
3. Measure frequency response:
100Hz��1GHz ��
4. Inherent errors in voltage measurement:
± 1% full-scale value ± 10 words Attachment configuration: T-shaped connector, 50 �� terminal load, 75 �� terminal load, connector (Q9 seat~probe), 100:1 voltage divider (optional), three-way connector (optional), 600 �� terminal load (optional)
5 input capacitors:
��2PF��
External dimensions:
220 × 105 × 290 (mm)
6 Weight: 2Kg

[voltmeter]WY2271 Type RF Millivolt Meter (Ultra High Frequency Millivolt Meter)

2026-6-15 21:32:37

Characteristics of WY2271 RF Millivolt Meter (Ultra High Frequency Millivolt Meter):

Using only one probe to achieve ultra wide frequency response: 1kHz to 1.5GHz.
Exceeding the frequency response characteristics of similar millivolt meters; The frequency response index of low level (<30mV) is consistent with that of high level.
Highly reliable keycap style tactile range switch, with no worries of slipping or misalignment.
High quality probes with strong interchangeability.
Normalize the linear scale for easier reading.

Two main technical specifications:
2.1 Voltage Measuring Range:
0.3mV~3V (using a 100:1 voltage divider can reach 300V), divided into eight levels: 1mV, 3mV, 10mV, 30mV, 100mV, 300mV, 1V, and 3V.
2.2 Level Measuring Range:-
57dBm��+23dBm�� Both 50 �� and 75 �� systems can display.
2.3 Broad Operating Frequency:
(Tested at both 1V and 10mV levels based on 100kHz)
10kHz~100MHz ��± 2%, 1kHz~300MHz ��± 3%, 300MHz~1GHz ��± 6%, 1GHz~1.5GHz ��± 15%.
2.4 Basic Error:
± 2.5%.
2.5 Input Impedance:
�� 15k ��/2.5pF.
2.6 Dimensions:
140 × 210 × 245mm, 3kg.

[voltmeter]HFJ-8D RF Millivolt Meter (Ultra High Frequency Millivolt Meter)

2026-6-15 21:32:28

Characteristics of HFJ-8D RF Millivolt Meter (Ultra High Frequency Millivolt Meter):

High quality probes ensure interchangeability.
�� Long life touch range switch, more durable.
�� It has the function of remote control operation (optional).
Linear normalization scale makes reading more convenient.
Vertical chassis reduces desk space.

Main technical specifications of HFJ-8D RF millivolt meter (ultra-high frequency millivolt meter):
1. Measurement range: 0.8mV~10V, divided into 8 ranges. (Choose a 40dB voltage divider to expand the measurement range)
2-level indication: -48dBm~+33dBm (0dBm=50 ��, 1mW)
3 Frequency response range: 1KHz~1GHz (with optional low-frequency probe, it can be as low as 20Hz)
Basic error: ± 3%
5 Input Impedance: 15K ��/2PF
6. Dimensions: 210 × 140 × 245 (mm)

[voltmeter]HFJ-8G RF Millivolt Meter (Ultra High Frequency Millivolt Meter)

2026-6-15 21:32:20

Characteristics of HFJ-8G RF Millivolt Meter (Ultra High Frequency Millivolt Meter):

Using only one probe to achieve ultra wide frequency response: 100Hz~1.5GHz
�� High reliability keycap style touch range switch, with no worries of slipping or misalignment
High quality probes with strong interchangeability
�� Normalize the linear scale for easier reading

Main technical specifications:
1. Measurement range:
0.8mV��10V�� Divided into 8 ranges. (Choose a 40dB voltage divider to expand the measurement range)
2-level indication: -48dBm~+33dBm (0dBm=50 ��, 1mW)
3 Frequency response range: 100Hz~1.5GHz (with optional low-frequency probe, it can be as low as 20Hz)
Basic error: ± 3%
5 Input Impedance: 15K ��/2PF
6. Dimensions: 210 × 140 × 245 (mm)

[voltmeter]WY1972D Digital dual channel AC millivolt meter

2026-6-15 21:32:11

WY1972D is a fully automatic digital dual channel AC millivolt meter with a large LCD screen that displays multiple sets of data simultaneously This machine has functions such as common ground/floating and dual channel synchronous/asynchronous range control, which can conveniently test the balance and gain of dual channels This machine is the preferred choice for audio engineering, college electronic laboratories, and analog signal testing

Characteristics:
Simultaneously display voltage value and dBm/dBV value
Multi parameter automatic measurement
High impedance, high resolution, high precision
Synchronous switching function: convenient for measuring the consistency of stereo amplifiers
�� dB calculation function: convenient for measuring gain, insertion loss, amplitude frequency characteristics, etc. between two output and input channels
Floating function: capable of effectively measuring non ground signals
Automatically reset to zero

Main technical performance:
1. Voltage measurement range:
30 �� V~400V
2. Level measurement range:
-90dBV~+52dBV, -88dBm~+54dBm
3. Highest resolution:
1 �� V, 0.01dB
4. Frequency response range:
5HZ~2MHz
5. Inherent error:
1% ± 6 words
6. Input impedance:
Input resistor 10M ��, input capacitor 30PF
7. Communication output:
When fully displayed, output 100mVrms, output impedance 10k ��
8. Display function:
3999 dual display voltage value, three digit dual digital display dB value
9. Consistency between two channels:
± 1%
10. Interval height between two channels:
�� 100dB
11. Dimensions/Weight:
280×240×88(L×W×H)mm,3kg

[voltmeter]WY1972P Type Dual Channel Digital High Frequency Current/Voltage Meter

2026-6-15 21:32:02

The WY1972P dual channel digital high-frequency current/voltage meter is a fully automatic AC current and voltage measuring instrument controlled by a CPU. It has a wide measurement response frequency range (10Hz~2MHz), and the LCD digital displays multiple sets of parameters simultaneously. It has automatic range selection for undervoltage and overvoltage indication of the measured voltage, making it easy to measure AC current and voltage simultaneously. Voltage measurement has a high input impedance (10M ��/40pF), high measurement accuracy, and good linearity. This machine also has an input floating selection function.

Features:
�� Automatic/manual range selection, voltage and current undervoltage and undercurrent, overvoltage and overcurrent indication.
Simultaneous measurement of AC current and voltage, with a wide measurement range (100 µ V~400V, 20 µ A-5A) and high resolution (1 µ V, 0.1 µ A).
LCD displays multiple sets of parameters simultaneously: V, dBm, and I values.
Voltage measurement automatically resets to zero, current measurement has low internal resistance (1 ��).

Main performance indicators of WY1972P dual channel digital high-frequency current/voltage meter:

2.1 Voltage measurement range: 100 µ V to 400V, divided into six ranges: 4mV, 40 mV, 400 mV, 4V, 40V, 400V. Composed of four LC members
D digital display: maximum display of 4200. Maximum resolution: 1 µ V or 0.01dB.
2.2 Level measurement range: -90dBV to+52dBV, -88dBm to+54dBm.
2.3 Measurement voltage and current frequency response range: 5Hz~2MHz.
2.4 Current measurement range: 20 µ A-5A. Divided into 1 level 0.2mA-A (internal resistance 1 ��) and 0.1 level 20 µ A-1A (internal resistance 10 ��). Resolution: up to 0.1 µ A. 2.5 Voltage measurement error: ± 1% ± 5 words at 4mV level ± 2% ± 5 words. Current measurement error: ± 1.5% ± 5 words �� 0.5mA ± 2% ± 10 words 2.6 Frequency response error (based on 1kHz): ± 3%
2.7 Noise voltage: �� 5 �� V when the input terminal is well short circuited.
2.8 Input impedance (voltage measurement): 10M ��/40pF
2.9 Isolation between two channels: �� 100dB (at 1kHz)
2.10 Dimensions: 280 × 88 × 240 (mm).

Weight: Approximately 2.5Kg.

[voltmeter]WY1972A Digital dual channel AC millivolt meter

2026-6-15 21:31:54

The WY1972A digital dual channel AC millivolt meter consists of a high stability amplifier composed of an integrated circuit and transistors, as well as a liquid crystal display circuit. The large LCD displays clear and intuitive readings, with an input impedance of up to 10M ��, ensuring the measurement system's error and enabling accurate measurement of AC voltage. The input of this machine can be set as floating or grounded. Floating input measurement is particularly suitable for ensuring safety in balanced conveying, tuning indication, potential difference measurement, and high voltage measurement.

Main performance indicators of WY1972A digital dual channel AC millivolt meter:
1. Measurement voltage range: 100 �� V~400V Six range: 4mV, 40mV, 400mV, 4V, 40V, 400V Maximum display 3999
2. Measurement frequency response: 10Hz~2MHz
3. Inherent error in voltage measurement: ± 0.5% ± 5 words; 4mV range ± 1% ± 5 words
Voltage measurement frequency response error: ± 5% (based on 1KHz)
5 dual channel indication deviation: �� 1% ± 10 words
6-channel isolation: 100dB (at 1KHz)
7 Input Impedance: 10M ��//40PF (excluding input cable)
8 Dimensions and Weight: 220 × 105 × 290 (mm) 2.5Kg

[voltmeter]Dual channel AC millivolt meter (digital range switch)

2026-6-15 21:31:45

WY2294A dual channel AC millivolt meter (digital range switch) features:
�� Wide measurement range: Thirteen levels with a range of 30 �� V to 300V
Low local noise: �� 5 �� V, the highest level in China
�� Wide frequency: 5Hz-2MHz, measured up to 5MHz
High input impedance: �� 10M ��, high impedance is the foundation for ensuring correct testing
�� Friendly human-machine interface: Soft digital range switch, circular arrangement LED clear display status. Double needle display on the same watch
Durable and long-lasting: No worries about misalignment and slipping, input protection and output current limiting, and no overshoot of the electric meter.
This machine also has functions such as common ground/floating selection, dual channel synchronous/asynchronous range control, etc., making high voltage measurement safe and micro voltage measurement accurate. Can conveniently test dual channel balance and amplifier gain. This machine will be the first choice for audio engineering, college electrical engineering, electronic laboratories, and analog signal testing.

WY2294A Dual Channel AC Millivolt Meter (Digital Range Switch) Technical Performance:
1. Measurement voltage range: 30 �� V-300V, maximum sensitivity level of 300 �� V, divided into thirteen measurement ranges
2 Measurement level range: -90dBV to 50dBV or -90dBm to+52dBm (0dBv=1Vrms, 0dBm=600 load 1mw)
3. Measure voltage frequency response: 5Hz~2MHz
4. Measurement voltage inherent error: ± 2%
5 Voltage measurement frequency response error: ± 5% (based on 1KHz)
6 Input impedance: �� 10M ��
7. Local noise voltage: �� 5 �� V
Isolation between 8 channels: 100dB
9. Dimensions: 210 × 140 × 245 (mm)
Weight: 2.5kg

[voltmeter]WY2294 Dual channel AC millivolt meter

2026-6-15 21:31:36

The WY2294 dual channel AC millivolt meter adopts dual channel input and coaxial dual pin meter indication. Input and output can be floating. Equipped with synchronous and separated measurement functions, electrically controlled switch, and comfortable hand feel. The measured noise of this machine is less than 5 �� V, reaching the advanced level of similar foreign products.

WY2294 dual channel AC millivolt meter features:
1. Voltage measurement range: 30 �� V to 100V, with 12 measurement ranges
2-level measurement range: -90dBm to+42dBm (0dBm=0.775V)
Frequency response range: 5Hz~1MHz
4 Basic errors: �� 2%
Frequency response error: �� 5%
6 Two channel indication deviation: �� 3%
7 Two channel isolation: �� 90dB
8 Input impedance: �� 10M ��, �� 40PF
9. Dimensions: 210 × 140 × 245 (mm)
10 Weight: Approximately 3Kg

[voltmeter]WY2221/A Video Millivolt Meter

2026-6-15 21:31:27

The input circuit of WY2221/A video millivolt meter adopts low-noise field-effect transistor, which makes the whole machine highly sensitive, reliable, and stable in performance. Adopting an electronic control switch for comfortable hand feel.

Characteristics:
1. Voltage measurement range: 100 �� V~100V, divided into 12 ranges of 300 �� V~300V (WY2221A)
2-level measurement range: -90dBm to+42dBm (0dB=0.775V) -80dBm to+52dBm (WY2221A)
Frequency response range: 10Hz~10MHz
Basic error:<3%
Frequency response error: 5% to 10% (segmented)
6 Input Impedance: �� 1M ��, 40PF
7. Dimensions: 210 × 140 × 245 (mm)
8 Weight: Approximately 2.5kg

[voltmeter]5Hz-2MHz) Digital AC Millivolt Meter

2026-6-15 21:31:18

The WY1971D digital AC millivolt meter (5Hz-2MHz) is an upgraded product of the original WY1971. It is an intelligent digital instrument based on CPU control and can measure the effective value and corresponding level value of sine wave voltage with frequencies ranging from 5Hz to 2MHz. The voltage measurement range is from 30 �� V to 1000V, with a resolution of 0.1 �� V, which is the highest level in China. Specially designed LCD screen with menu style display of multiple parameters and dynamic pointers for range automation.

One characteristic:
�� 12000 five digit LCD digital display voltage, with a maximum resolution of 0.1 �� V.
LCD four digit digital display with dB value and resolution of 0.01dB.
�� Wide measurement range: 30 �� V to 1000V.
�� Frequency response width: 5Hz~2MHz.
�� Input high impedance: �� 10M ��/30pF.
High precision measurement: 0.5% ± 5 words.
�� Automatic/manual range control.
�� BCD code remote control range (optional).

Technical specifications of WY1971D digital AC millivolt meter (5Hz-2MHz):
2.1 Measurement voltage range: 30 �� V~1000V, seven range: 1mV, 10mV, 100mV, 1V, 10V, 100V, 1000V, resolution 0.1 �� V.
2.2 Measurement level range: -90dBm to+60dBm (0dBm=0.775V), and dBV display (0dB=1Vrms), with a resolution of 0.01dB.
2.3 Measurement frequency response: 5Hz~2MHz.
2.4 Voltage measurement inherent error: ± 0.5% ± 5 words, linearity 0.5%, 1mV range ± 1% ± 5 words.
2.5 Voltage measurement frequency response error (based on 1kHz): 20Hz-100kHz ± 3%, 10Hz-1MHz ± 5%, 5Hz-2MHz ± 7%.
2.6 Input impedance: �� 10M ��/30pF.
2.7 Output Characteristics: When the indicator is at full scale, the output voltage is about 100mVrms and the output impedance is 600 ��
2.8 Dimensions and Weight: 220 × 105 × 290 (mm), 2.5kg

[voltmeter]0.1µV Digital AC Millivolt Meter (0.1µV Resolution)

2026-6-15 21:31:09

WY1971 digital AC millivolt meter (0.1 µ V resolution) consists of a high stability amplifier composed of integrated circuits and transistors, analog-to-digital conversion, voltage digital display, and automatic zero circuit. With a resolution of up to 0.1 �� V, it is the highest level in China, and coupled with a 10M �� input impedance, it ensures that the measurement error of the series is minimized, and the application range of this machine is the widest. The LCD reading is clear and intuitive, with dBm and overvoltage/undervoltage indicators, making it easy to measure AC voltage. This function can achieve range remote control (optional)

WY1971 Digital AC Millivolt Meter (0.1 µ V Resolution) Features:

3999LCD digital display voltage, step display dBm value up to 0.1 �� V resolution
�� Wide measurement range: 30 �� V-360V
�� Frequency response width: 10Hz-2MHz
High input impedance: �� 10M ��/46PF
Low measurement error: 0.5% ± 5 words
�� Light touch range switch, no worries about slipping or misalignment of knobs, BCD code remote range.

WY1971 Digital AC Millivolt Meter (0.1 µ V Resolution) Main Technical Specifications:
1. Measurement voltage range: 30 �� V-360V. Seven ranges: 360 �� V, 3.6mV, 36mV, 360mV, 3.6V, 36V, 360V
2. Measurement level range: -90dBm to 50dBm (0dBm=0.775V)
3. Measurement frequency response: 10Hz-2MHz
4. Inherent error in voltage measurement: ± 0.5% ± 5 words, 300 �� V range ± 1% ± 5 words
5 Voltage measurement frequency response error: ± 5% (based on 1KHz)
6 Output characteristics: When indicating full scale, the output voltage is about 100mVrms and the output impedance is 600 ��
7 Dimensions: 220 × 105 × 290 (mm)
8 Weight: 2.5kg

[voltmeter]WY2174A AC Millivolt Meter (Digital Range Switch)

2026-6-15 21:31:00

Characteristics of WY2174A AC Millivolt Meter:

�� Wide measurement range: Thirteen levels with a range of 30 �� V to 300V
Low local noise: �� 5 �� V, the highest level in China
�� Wide frequency: 5Hz-2MHz, measured up to 5MHz
High input impedance: �� 10M ��, high impedance is the foundation for ensuring correct testing
�� Friendly human-machine interface: Soft digital range switch, circular arrangement LED clear display status
Durable and long-lasting: No worries about misalignment and slipping, input protection and output current limiting, and no overshoot of the electric meter.
This machine also has a common ground/floating selection, making high voltage measurement safe and micro voltage measurement accurate. This machine will be the first choice for audio engineering, college electrical engineering, electronic laboratories, and analog signal testing.

Main technical indicators:
1. Measurement voltage range: 30 �� V-300V, maximum sensitivity level of 300 �� V, divided into thirteen measurement ranges
2 Measurement level range: -90dBV to 50dBV or -90dBm to+52dBm (0dBv=1Vrms, 0dBm=600 load 1mw)
3. Measure voltage frequency response: 5Hz-2MHz
4. Measurement voltage inherent error: ± 2%
5 Voltage measurement frequency response error: ± 5% (based on 1KHz)
6 Input Impedance: �� 10M ��, �� 40PF
7. Local noise voltage: �� 5 �� V
Isolation between 8 channels: 100db
9. Dimensions: 210 × 140 × 245 (mm)
Weight: 2.5kg

[voltmeter]WY2174 AC millivolt meter

2026-6-15 21:30:52

The WY2174 AC millivolt meter adopts a PC panel, a mirrored meter head, and input and output can be floating. Has excellent EMI performance. Using an electronic control switch provides a comfortable feel. The measured noise of this machine is less than 5 �� V, reaching the advanced level of similar foreign products.

Characteristics:
1. Voltage measurement range: 30 �� V to 100V, with 12 measurement ranges
2-level measurement range: -90dBm to+42dBm
Frequency response range: 5Hz~1MHz
4 Basic errors: �� 2%
Frequency response error: �� 5%
6 Input Impedance: �� 10M ��, �� 40PF
7. Dimensions: 210 × 140 × 245 (mm)
8 Weight: Approximately 2.5Kg

[voltmeter]DA-16D AC millivolt meter

2026-6-15 21:30:43

Overview
The DA-16D AC millivolt meter is an improved product of my DA-16 model, which has the advantages of high sensitivity, high input impedance, and high stability. The use of large signal detection in the circuit ensures good linearity of the instrument, and noise has little impact on measurement accuracy, so zero adjustment is not required during use.
This instrument has a wide frequency band, ranging from 10Hz to 2MHz, and uses a two-stage voltage divider to measure a wide voltage range, from 100 �� V to 300V. It is easy to use and is an indispensable testing equipment for factories, schools, and research institutions.
This millivolt meter is a Group II instrument in the GB6587 standard.

Working characteristics of two DA-16D AC millivolt meters
2.1 Voltage measurement range:
100��V��300V, Divided into 12 levels: 1mV, 3mV, 10mV, 30mV, 100mV, 300mV, 1V, 3V, 10V, 30V, 100V, 300V
2.2 Measurement level range: -80dB to+52dB (0dB=0.775V)
2.3 Tested voltage frequency range: 10Hz~2MHz
2.4 Inherent error: ��± 3%
2.5 Working error: ��± 5%
2.6 Frequency response error (based on 1kHz):
100Hz��1MHz��±5% 10Hz��2MHz��±10%
2.7 Input impedance:
At 1kHz, the input resistance is greater than 2M ��, and the input capacitance (including wiring capacitance) is approximately 40pF
2.8 Working temperature: 0 ��~40 ��
2.9 Power Supply Voltage: 200V ± 10% 50Hz ± 4% Power Consumption 3W
2.10 Dimensions: 220 × 150 × 100 (mm), net weight approximately 3kg

[voltmeter]D26-V series AC/DC voltmeter

2026-6-15 21:30:34

Specification and main technical parameters of electric AC/DC meters

D26V

75/150/300V

125/250/500V

150/300/600V

4.5/9/18W

5/10/20W

6/12/24W

��

60mA

AC/DC voltmeter level 0.5	D26-V	0-75-150-300V
		0-125-250-500V
		0-150-300-600V
		0-75-150-300-600V (special specification)

265×195×135

The D26-V series AC/DC voltmeter is used for measuring current, voltage, and power in DC circuits and AC 50Hz circuits, or as a standard meter