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  • 1/2 inch Brass Water Flow Sensor - SEN-HZ21WI

Now easily measure water (liquid) flow in your application using this 1/2" Brass water flow sensor. This is good quality flow sensor with brass body and can be used for industrial and commercial applications. This half inch water flow sensor is used extensively is various types of vending machines.

This water flow sensor is connected in line with the liquid whose flow rate has to be measured. There is a simple rotating wheel with a magnet and when the liquid flows the wheel is rotated and a hall effect sensor measures how many times he wheel is rotated and accordingly gives pulses. By counting the number of pulses you can easily calculate the flow rate as well as the amount of liquid dispensed.

The sensor comes with a 3 pin JST connector.

Red : Vcc 5 to 18 volts

Black :  Ground

Yellow : Pulse Output signal

Specifications of SEN-HZ21WI Water flow Sensor:-

  • Model: SEN-HZ21WI
  • Water quality requirement: Drinking water health standards, 0~80℃
  • Flow range: 1~ 30 Liter/min
  • Withstand hydraulic pressure: ≤1.75 MPa
  • Voltage/electric current: DC4.5~18V, ≤15mA
  • Insulation resistance: >100MΩ
  • Electrical strength: AC500V, 50HZ
  • Output level: Rated voltage DC 5 Volt, high level ≥4.5 Volt, low level ≤ 0.5 Volt
  • Pulse duty cycle: 50%
  • Flow characteristic: F=10 Q-4, F:HZ, Q:L/min,±10%
  • Cumulative flow conversion: 1 Liter water = 553 pulses , accuracy: 10%


  • Widely used in water industrial field, such as thermostatic water heater, water purifier, water dispenser, smart card equipment, coffee machine etc.


  • When magnetic material is close with the sensor, its characteristics may vary.
  • In order to avoid particle debris, the sensor must be installed after a filter.
  • The flow sensor installation has to avoid strong vibration and shaking of the environment, so as not to affect the sensor's measurement accuracy.

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* Product Images are shown for illustrative purposes only and may differ from actual product.

1/2 inch Brass Water Flow Sensor - SEN-HZ21WI

  • Product Code: EC-3060
  • Availability: 7
  • Rs.325.00