YF-S201 counter flow meter sensor

Specifications Measurement Range: 1 to 30 Liters/Minute Sensor Type: Hall Effect Working Voltage: 5 to 18V DC (min tested working voltage 4.5V) Max current draw: 15mA @ 5V Output Type: 5V TTL Working Temperature range: -25 to +80°C Working Humidity Range: 35%-80% RH Accuracy: ±10% Maximum water pressure: 2.0 MPa Output duty cycle: 50% +-10% Output rise time: 0.04us Output fall time: 0.18us Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min) Pulses per Liter: 450 Durability: minimum 300,000 cycles Cable length: 15cm Pipe Connections: 1/2” nominal pipe connections, 0.78” outer diameter, 1/2” of thread Overall Dimensions: Size: 2.5” x 1.4” x 1.4” Wiring: Red for +5V Black for GND Yellow for CH+