Plastic Flow Sensor

YF-S301 Water Flow Sensor 0.3-10LPM 3/8" PE Pipe Quick Connection

YF-S301 Water Flow Sensor 0.3-10LPMFeatures:The hall effect water flow sensor is light, nimble outline, small size and easy to install. All materials are in line with SGS testing standards. There is a

  • Model: YF-S301

YF-S301 Water Flow Sensor 0.3-10LPM 3/8" PE Pipe Quick Connection


The hall effect water flow sensor is light, nimble outline, small size and easy to install. All materials are in line with SGS testing standards. 

There is an integrated hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. 

Stable, high temperature, low water pressure start. 

Three wires connection: Red for positive, black for negative, yellow for pulse signal.


Water heater, washing machine, boiler, electromagnetic water heater, water dispenser, water purifier, R.O. machine, U.F. machine, coffee machine, water machine, water machine control, water control machine, beer machine, beauty equipment, shower equipment, electrolytic water machine, energy engineering, heat pump,IC meter, steam equipment, irrigation equipment, water system, campus card self-service sale (sell) water machine, washing machine, automatic washing equipment, water treatment equipment, water dispensing equipment, cooling system, circulation system, intelligent toilet (toilet), bidet, mechanical equipment, heating equipment,  Pharmaceutical (agents) equipment etc.

Calculation Formula: 

*F(Hz)= 21*flow rate(Q)(l/min)


*Error:±5% for both formula;

What is the formula and how to use the formula?


1.POM body and turbine, SUS304 stainless steel shaft(axle).

2.Inlet and outlet connection, easy operation; quick connector for 3/8" PE pipe;

3.Imported Hall IC from U.S., stable and reliable;

4.Flow Range: 0.3-10L/min;

5.Working voltage: DC1.8-5V(low consumption version),5-18V(regular version), 5-24V(PLC version)

6.Rated voltage: DC3/5/24V for three different versions

7.Output voltage:

  Rated: DC5V for regular version: output high level 4.5V and above; low level 0.5V and below

  Rated: DC24V for regular version: output high level 23.5V and above; low level 0.5V and below

8.Pulse output duty cycle: 50+-10%

9.Insulation resistance: 100M Ohm and above;

10.Tightness: Seal up all the holes, and inflate with 0.8MPa water, after 1 minute, no leakage and deformation;

11.-20-60 centigrade;

12.Max Pressure: 0.8Mpa

13.Electrical Strength: AC500V 50Hz.

14.Wire length: regular 15cm, other length can be tailor made against request.

15.Wire end connection: SM2.54 Plug/XH2.54 plug


1. When magnetic material is close with the sensor, its characteristics may vary.

2. In order to avoid particle debris, the sensor must be installed after a filter.

3. The flow sensor can be installed in any direction. IT has to avoid strong vibrating and shaking environment, so as not to affect the accuracy.

label: YF-S301