LWY-S type turbine flowmeter for water treatmentDetailed product description：

1、 Overview:
1. The LWGY turbine flow sensor (hereinafter referred to as the sensor) is paired with a display instrument to form a turbine flow meter. It can measure the instantaneous flow rate and cumulative volume of liquids, and can also quantitatively control liquids. Sensors have the characteristics of high precision, long lifespan, simple operation and maintenance, and are widely used in industries such as mining, petroleum, chemical, metallurgy, and papermaking. Because all sensors are made of non-metallic materials (UPVC), it is particularly suitable for use in the water treatment industry. It is an ideal instrument for flow measurement and energy conservation.
2. Sensors are suitable for liquids without impurities such as fibers and particles.
3. The instrument coefficient given in the verification certificate is applicable to the case where the viscosity of the medium at the working temperature is less than 5 × 10-6m ²/S. For liquids larger than 5 × 10-6m ²/S, the sensor should be calibrated with real liquid before updating the instrument system.
4. If users require special types of sensors, they can negotiate and place orders together. When explosion-proof sensors are required, please specify in the order.

2、 Working principle:
When the measured liquid flows through the sensor, the impeller inside the sensor rotates with the help of the kinetic energy of the liquid. At this time, the impeller blades cause periodic changes in the magnetic resistance of the detection device, resulting in the induction of electrical pulse signals proportional to the flow rate at both ends of the detection coil. After amplification by the preamplifier, the signals are sent to the display instrument.
Within the measurement range, the flow pulse frequency of the sensor is proportional to the volumetric flow rate, and this ratio is the instrument coefficient expressed in K: K=f/Q or K=V/N
In the formula: f - flow signal frequency (Hz);
Q - Volume flow rate (m ³/h or L/h);
N - number of pulses;
V - Total volume (m ³/L);
The instrument coefficient of each sensor is filled in the calibration certificate by the manufacturer. When leaving the factory, the K value has been set in the matching display instrument, which can display the instantaneous flow rate and total volume. The manufacturer should avoid changing the K value when using it.

3、 Main technical parameters of LWY-S type turbine flowmeter for water treatment:
Basic parameters (see Table 1)
Accuracy: Level 1.0, Level 0.5;
Usage conditions:
1. Environmental temperature: -20 to+50 ℃;
2. Relative humidity: 5% to 95%;
3. Medium temperature: -20 to+80 ℃;
4. Explosion proof grade: ib Ⅱ BT4;
Medium pressure: 1.0Mpa;
Output mode: pulse output or 4-20mA two-wire system;
Transmission distance: The distance from the sensor to the display instrument can reach 1km;

Water treatment specific turbine flowmeter (on-site display) Water treatment specific turbine flow sensor

4、 The meaning of marking:
1. LWGY-S: Pulse output (powered by 5-24V);
2. LWGB-S: 4-20mA two-wire transmission output (24V power supply);
3. LWY-S: On site display shows instantaneous flow and cumulative maximum power consumption current of 25uA.

5、 Characteristics:
1. Wide flow range, with a maximum range ratio of 1:50;
2. All use non-metallic materials (UPVC);
3. The maximum power consumption displayed on site is 25uA.

Table 1

Model	Nominal diameter DN (mm)	Starting flow （m3/h）	Flow range (m3/h)	Installation type	L	D	d	Number of holes
LWGY-40S	forty	zero point two	0.6-20	flange	one hundred and forty	φ110	φ18	four
LWGY-50S	fifty	zero point three	1-40	flange	one hundred and fifty	φ125	φ18	four
LWGY-80S	eighty	zero point eight	7-100	flange	one hundred and sixty	φ160	φ18	eight
LWGY-100S	one hundred	one point five	10-200	flange	one hundred and eighty	φ180	φ18	eight