A water flow sensor is a plastic valve body with rotor that provides a hall-effect sensing when water flows through the motor. The motor will roll and the speed will change on a different rate flow. The hall-effect sensor will read the corresponding voltage pulse signal and send the signal to the micro controller and provide liquid flow rate as data.

Hall-Effect-Water-Flow-Sensor-1Hall-Effect-Water-Flow-Sensor

How it works?

Rotor-Flow-Hall-effect-water-flow-sensor

As liquid passes through the valve and the magnetic rotor spins at a rate proportional to flow, a series of magnetic field to stimulate the hall effect sensor and producing a series of voltage pulses. The output voltage pulses are the same voltage level as the input with a frequency proportional flow rate. The output signal can be digital rate totalizes or other electronic controller.

Wiring the Sensor to Arduino Board

Hall-Effect-Water-Flow-Sensor-Diagram

Arduino Source Code / Sketch Using the Water Flow Sensor

 

 

 

 

Water flow rotor/motor sensor wiring guide on Arduino
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