LRS51 High temperature liquid level (differential pressure) transmitterDetailed product description：

Overview and Applications
The high temperature liquid level transmitter is the LRS51 high temperature differential pressure transmitter. In industrial production process detection and control systems such as petroleum, chemical, metallurgical, power, food, mining, papermaking, pharmaceuticals, textiles, etc., the LRS51 high temperature liquid level/differential pressure transmitter is equipped with a throttling device to detect the flow of liquid, gas, and steam, and can also be directly used to detect differential pressure, as well as the liquid level in open or closed containers.
The LRS51 high-temperature liquid level/differential pressure transmitter converts the measured signal into a 4-20mA DC output signal (the intelligent transmitter can communicate with Hart protocol), and cooperates with other unit combination instruments or industrial control computers to form industrial automation systems such as detection, recording, and control.

This series of transmitters is divided into ordinary and explosion-proof types. The explosion-proof transmitter has been inspected and approved by the national level instrument explosion-proof safety supervision and inspection station, with explosion-proof marks of dIIBT4 and IAIICT6.

Main Features
1) Flange connection, high temperature liquid level transmitter
2) Customizable threaded connection (capillary with flush film thread type)
3) Capillary pressure tube filled with high-temperature silicone oil (-40~375 ℃)
4) Connection flange and thread size specifications can be customized
5) High precision; Intelligent ± 0.1% FS, special orders ± 0.075% FS
6) Good stability;
7) Second-line system;
8) Damping time: 0.1s~16s (adjustable by 0.1s each time)
9) Remote controllers or upper computers can be used to manage and control the internal information configuration of the transmitter, so that the transmitter is in the required working state.
The configuration data is stored in an EEPROM that is not lost during power failure.
10) Optional intelligent digital LCD display, on-site display of differential pressure/pressure values, output current values, and output percentage values.
11) Fault alarm: The fault alarm signal can be selected by the user, 3.8mA or 22mA
12) It has continuous self diagnostic function and can display self diagnostic information.
13) It has linear compensation and digital fine-tuning functions.
14) It can achieve on-site adjustment of zero position and range, and can also be remotely adjusted through a handheld device, desktop, or portable computer.
15) Linear or root square output can be selected according to different application scenarios.
16) It can convert liquid level values between kPa, Pa, in H2O, bar, MPa, etc.
17) The failure/safety mode can be set by turning the failure/safety switch.
18) It has single point, multi-point, and burst modes.
19) Equipped with power-off protection function, it can automatically save its working data in case of power failure.
20) Solid components, plug-in printed circuit boards;
21) Small, lightweight, sturdy and vibration resistant;
22) Range and zero point can be continuously adjusted externally (intelligent models require Hart controller/software or in shell adjustment)
23) Positive migration can reach 500%, and negative migration can reach 600%; The intelligent range ratio is 10:1
24) Adjustable damping;
25) Good one-way overload protection characteristics;
26) No mechanical movable parts, low maintenance workload;
27) Unified structure for the entire series; Strong interchangeability of components;
28) The membrane material in contact with the medium can be selected from corrosion-resistant materials such as 316L, Hastelloy B, Hastelloy C, Tantalum, Monel, etc
29) IP67 high protection level, suitable for all day use.

Functional specifications
Target audience: liquids/slurries
Measurement range: 0-25Pa~40MPa (see selection table for details)
Output signal: 4-20mA DC, intelligent type supports Hart protocol communication (special orders can be ordered with four wire 220V AC power supply 0-10mA DC)
Output)
Power supply: 12-45V DC, generally recommended 24V DC
Load characteristics: related to the power supply, with a typical value of 500 Ω, carrying load capacity at a certain power supply voltage: load impedance RL and
The relationship between power supply voltage Vs is: RL ≤ 50 (Vs-12)
Indicator: An ammeter can be used for on-site output indication, and our company can provide linear indication 0-100% and square root indication 0-100% meter heads;
3 1/2 digit LCD digital display table, with 13mm high output displayed as a percentage.
Explosion proof: Our factory produces two types of explosion-proof transmitters: a. Explosion proof dIIBT4; b、 Intrinsically safe iaIICT6
Range and zero position: externally continuously adjustable, intelligent models require Hart operator/software or in shell adjustment
Positive and negative migration: The maximum positive migration of the differential pressure transmitter is 500%, and the maximum negative migration is 600%;
Working temperature: Electronic components: -29~+93 ℃ (ordinary type transmitter)
-20~+60 ℃ (explosion-proof transmitter)
Sensing components: -40~+375 ℃ (filled with high-temperature silicone oil)
LCD display: -20 to+70 ℃
Environmental humidity: 0-100% RH.
Storage temperature: -40 to+100 ℃
Overload pressure: not exceeding 1.15 times the maximum static pressure (see selection table for maximum static pressure)
Volume change: ＜ 0.16cm3
Damping time: continuously adjustable within 0.2-1.67 seconds (0.1-16 seconds for intelligent models), suitable for micro, low differential pressure, and flange transmitters,
The damping time is slightly longer; Damping time refers to the step response time.
Start time: 2 seconds, no preheating required.
Vibration effect: When the vibration frequency is 200Hz in any direction, the error caused is 0.05%/g of the maximum range;
Range codes 1 and 2 (micro differential pressure) are ± 0.1%/g
Power supply impact: less than ± 0.005%/V of the output range.
Load impact: When the power supply is stable, there is no load impact.
Installation position influence: When the working diaphragm is not installed vertically, a zero position system error of about 0.24 kPa may occur, which can be eliminated by adjusting the zero position and has no effect on the range.
Shell protection level: IP67
Other
Structural materials: The materials of parts in contact with the medium, such as pressure chambers, joints, relief valves, and isolation diaphragms, are listed in the selection table.
The bolts are chrome plated carbon steel;
The electrical casing is made of low copper aluminum alloy;
The surface coating of the electrical casing is epoxy spray.
Pressure connector: There is a 1/4-18NPT female threaded connection screw hole on the pressure chamber itself;
The connection screw holes of the pressure joint have 1/2-14NPT internal thread, M20 × 1.5 external thread, G1/2 "male thread, and various flange specifications
Connection holes for signal lines (cables): G 1/2 ", M20 × 1.5, etc
Weight: Approximately 15.6kg (excluding specially customized flange specifications)

Selection instructions (simply select item by item from top to bottom to obtain the complete item number)

LRS51 F	Capillary pressure tube high temperature resistant liquid level transmitter
LRS91 F	Intelligent capillary pressure tube high temperature resistant liquid level transmitter
	code	Name of transmitter
	GP	Open container high temperature liquid level transmitter
	DP	Sealed container high temperature liquid level transmitter
		code	measurement range			Maximum working pressure (static pressure)					Precision
		three	0-1.3～7.5 kPa			2.5-4-5-10 MPa (please specify when ordering)					0.2%
		four	0-6～40 kPa			Ditto.					0.2%
		five	0-31.1～186.8 kPa			Ditto.					0.2%
		six	0-117～690 kPa			Ditto.					0.2%
		seven	0-345～2068 kPa			Ditto.					0.2%
		eight	0-1.17～6.89 MPa			Ditto.					0.2%
		nine	0-3.45～20.68 MPa			Please specify when placing an order for 32MPa					0.2%
			code	output signal
			E	4-20 mA DC
			S	4-20 mA DC+HART signal
				code	Flange material					Isolation membrane
				twelve	Nickel plating on carbon steel					316 stainless steel
				twenty-two	316 stainless steel					316 stainless steel
					S1	A remote transmission device (only for open/open containers with atmospheric access)
					S2	Two remote transmission devices (required for sealed containers)
						code	Unilateral capillary length (m)
						A	one point five
						B	three
						C	four point five
						D	six
						E	seven point five
						F	ten
						G	twelve
						H	fifteen
							code	Optional parts (if not selected, do not fill in)
							M1	0-100% linear indicator table
							M3	3 1/2 LCD digital linear display table
							B1	Pipe bending bracket
							B2	Board mounted bending bracket
							B3	Pipe mounted flat bracket
							d	Explosion proof dIIBT4
							i	Intrinsic safety type iaIICT6
								/	Remote transmission device model PFW
Example of LRS51 F-DP 5 E 22 S2 B B1 downlink transmitter selection

1199 PFW	Flat capillary pressure tube remote transmission high-temperature resistant device
	code	Flange Specification
	ten	DN50 flange
	one hundred and one	2 "flange
	eleven	DN80 flange
	one hundred and eleven	3 "flange
	twelve	DN100 flange
	one hundred and twenty-one	4”flange
	thirteen	DN150 flange
	one hundred and thirty-one	6 "flange
		code	Remote transmission flange diaphragm material (diaphragm material in contact with liquid)
		A	316L
		B	Hastelloy B
		C	Hastelloy C
		D	Tantalum film
		E	Titanium membrane
		F	PTFE
			code	Shell material
			eleven	316SST
				code	Temperature resistance rating
				A	150℃
				B	205℃
				C	315℃
				D	375℃
1199 PFW-10 A 11 B selection example (please attach this model to the back of the high-temperature transmitter model)

LRS51 High Temperature Liquid Level (Differential Pressure) Transmitter