YF-S201 12mm Water Flow Sensor




9 in stock

329.00 (Exc. GST)

9 in stock

The Water flow sensor can be used to measure the flow of liquids, i.e. the consumption of liquids in industrial or domestic usage. For example you can make a robotic cocktail dispensing machine, and can use this sensors to accurately measure components like Soda, Water, etc. Water flow sensor consists of a plastic valve body, a water rotor, and a hall effect sensor. When water flows through the rotor, rotor rolls. Its speed changes with different rate of flow. The hall effect sensor outputs the corresponding pulse Signal.

I believe using this should be simple, you just need to connect to Arduino interrupt pin 2, and can measure the number of PWM pulse/interrupt per unit of time. The water flow would be directly proportional to the number of measured pulses.

Connection details:

  • Red wire is +5V.
  • Black wire is GND.
  • White wire is PWM signal output.


  • Lowest rated working voltage: DC4.5 5V-24V.
  • Maximum operating current: 15 mA (DC: 5V).
  • Working voltage range: DC 5~18V.
  • Load capacity: ≤ 10 mA (DC 5V).
  • Temperature: ≤ 80 ℃.
  • Operating humidity range: 35%~90%RH (no frost).
  • Allowed pressure: pressure 1.75Mpa.
  • Temperature: -25~+80 °C.
  • External threads: 1/2″ or 12 mm.
SKU: 249 Category:

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