This G3/4" Water Flow Sensor is composed of a plastic valve body, a water rotor, and a hall-effect sensor. Rotor rotation rate is determined by water flow rate; when rotor turns, the hall-effect sensor emits a corresponding pulse signal. This water flow sensor is suitable for detecting flow in water dispensers and coffee makers. Our selection of water flow sensors comes in a variety of diameters; browse our range to find the most suitable product for your requirements.