1. The Water Flow Sensor is light, nimble outline, small size and easy to install. All materials are in line with SGS testing standards.2. There is an integrated 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.3. Stable, high temperature, low water pressure start.4. Can use for Water heaters, credit card machines, water vending machine, flow measurement device.5. Three wire connection: Red for positive, black for negative, yellow for pulse signal. Specifications:Product Name: Water Flow SensorMaterial: Brass(Shell)Liquid Temperature: Not More Than 60CExternal Thread Diameter: G3/4Flow Range: 2-45L/minWorking Voltage Range: DC5VMax Current: 10mAMaximum Water Pressure: 1.75MPaConnector: Male SM-3PCable Length: 35cmSize: 60mm x 30mm x 31mm(L*W*H)Ingress Protection Rating: IP65Color: Brass ToneNet Weight: 152g Package Included:1 x Water Flow Sensor Note: 1. Installed in accordance with flow direction in the product, otherwise there is no signal output.2. A filter screen must be installed at the inlet of the sensor, in order to avoid particles and debris entering the sensor.