Plastic Flow Sensor

FS300A Water Flow Sensor BSPP G3/4"


  • Model: YF-DN40


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)= 4*flow rate(Q)(l/min)


*Error:±5% for both formula;

What is the formula and how to use the formula?


1.PA66 body and turbine, SUS304 stainless steel shaft(axle).

2.Threaded design of inlet and outlet connection;

3.Imported Hall IC from Japan, stable and reliable;

4.Flow Range: 1-60L/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: 1.7Mpa

13.Electrical Strength: AC500V 50Hz.

14.Wire length: regular 35cm, 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: FS400A