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Use this flow sensor to measure the rate to flow of liquids. The sensor has a digital interface which makes it simple and easy to connect it to a microcontroller, Arduino or a Raspberry Pi. It requires no extra circuit to start measuring liquid flow rate. The sensor will have to be attached in the liquid line whose flow is to be measured. A pinwheel inside the sensor moves as the liquid flows through the sensor. A hall effect sensor within the sensor senses the rotation of the pinwheel and outputs a digital pulse for every rotation. By counting the pulses from the sensor, you can easily sense liquid flow through the sensor. This allows easy interface to microcontroller, Arduino, Raspberry Pi, etc.

The sensor comes with three wires - Red (5V-12V), Black (Ground) and Yellow (Output pulse)

This sensor is great for water testing, water cooling systems, measure liquid flow, etc.


  • Model: SEN-HZ21WA
  • Test range: 1~30L/min(m³/h)
  • Connect way: 57.8 X 37 X 37 (in mm)
  • outside diameter: 1/2 inch
  • instantaneous flow pulse characteristics: F=[10Q]±10%, F means instantaneous pulse value(Hz),Q means instant flow
  • Max. Working current: 15mA
  • Insulativity: insulation resistance≥100MΩ
  • Use voltage: DC 5V
  • Fit media: Water
  • Working pressure: 1.75MPa
  • linearity: 0.01(%F.S.)
  • Output signal: Moder
  • Hysteresis: 0.01(%F.S.)

Package Includes:

1 x 1/2 inch Water Flow Sensor -SEN-HZ21WA

Country Of Origin
Packer / Importer Address Constflick Technologies Limited, Building No 13 and 14, 3rd Floor, 2nd Main, Siddaiah Road, Bangalore, Karnataka - 560027 India.
MRP Rs. 293.82 (Inclusive of all Taxes)
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* Product Images are shown for illustrative purposes only and may differ from actual product.

1/2 inch Water Flow Sensor SEN-HZ21WA

  • Product Code: EC-9932
  • Availability: 19
  • Rs.239.00
  • (Excluding 18% GST)


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