Features: 1. Stable, high temperature, low water pressure start, safe 2. Detect whether the liquid flow line and traffic is to meet the requirements, at the same for time by switching electrical contacts provide a signal output ON or OFF state 3. Equipment system by detecting the presence of a signal or a control current to pass therethrough (flow switch electrical contacts pass, off state) on the switch to determine the working status of the piping system Principle: When the water flow in the pipe is more than 0.75L / min, the core displacement under the action of water and promote the role of the magnetic source generates magnetic sensor outputs "1" switching signal, the signal input to the device control system, by expanding the power amplification to achieve the purpose of the water flow control. When the pipe in the water flow is less than 0.75L / min flow rate, the core magnetic source drive return under the action of the reset spring force, so that the sensor outputs "0" switch signal to stop operation of the system. Specification: Power: 60-90W Voltage:AC 220V Current: 0.5A Water Temperature Range:100 Pressure:0.6Mpa Female Port Thread Dia: G3/4 Male Thread(Fit Pipe Dia): G1/2 Cable Length: 26cm Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1x Water Flow Sensor Switch