Water Flow Sensor YF-S201

From the shop's description

Description of the YF-S201 YF-S201 is a water flow measurement sensor with high-grade quality sealing property. It works on the Hall effect principle and with a flow rate range of 1~30L/min. The module has three pins: Power, Ground, and the Analog output. YF-S201 consumes very little current and can work with an allowing pressure of ≤1.75MPa. Features of YF – S201 Operating Voltage: 4.5V to 18V DC Output type: 5V TTL Maximum current draw: 15mA at 5V The sensor used: Hall Effect Working Flow rate: 1 to 30 Liters/Minute Accuracy: ±10% Pulses per Liter: 450 Output duty cycle: 50% +-10% Maximum water pressure: 2.0 MPa Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min ) Outer diameter: 20mm Intake diameter: 9mm Outlet diameter: 12mm Pin configuration of YF-S201 YF – S201 has 3 Pins for power and the output. The table below explains the color, pin type, and function of the pin. Colour Pin type Function Red Power To provide power to the module Black Ground Connected to the ground terminal Yellow Signal Analog output from the sensor