Prowans Water Flow Sensor Module With Magnetic Hall Effect-1-30Litre/Minute Security Circuit and Motion Detector Electronic Hobby Kit

This is YF-S201 Water Flow Measurement Sensor with 1-30Leter/min Flow Rate in black color. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. There’s an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry.