Quick Overview 

1. Working Voltage: 5 to 18V DC (min tested working voltage 4.5V).
2. Max current draw: 15mA @ 5V.
3. Working Flow Rate: 1 to 30 Liters/Minute.
4. Maximum water pressure: 2.0 MPa.
5. Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min)

Product Description   

        This is YF-S201 Water Flow Measurement Sensor with 1-30Liter/min Flow Rate white sensor. 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.