Used for , automatic water dispensers, good flow monitor devices. Durable and practical. Stable and safe. High temperature, low water pressure . Detect whether the water flow line and is to meet the requirements, at the same time by switching electrical contacts a signal output ON or OFF state. 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. Product Name : Water Flow Sensor Switch Max Contact Rating : 150W Water Temperature Range : 1 - 100 Degree Celsius Current Load : 1A Male thread (fit pipe dia): OD: 20mm, ID: .12mm Colour:yellow Material:Metal + plastic Package Contents: 1 * water flow sensor switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.