This water flow switch uses water flow electromagnetic control device and on-off control sensing elements to achieve automatic control of pump. The induction chamber, magnetic control chamber and electronic components are designed separately in order to avoid switch failure caused by magnetic adsorption of iron in the pipeline. High temperature resistant material make the product can be used for both hot water (up to 70 degree Celsius) and cold water. It can start up pump when water pressure is 0.03KG. The electronic components used as control devices do not cause sparks during operation, which is very safe. Made of high-quality copper material, this switch is durable and of high strength. The length and the width is both 7cm. This water flow switch is widely used for low pressure area family, especially important for low water pressure ignition start-up of water heater, automatic water cycle of solar water heater. Item Name: Water Flow Switch Material:Copper Operating Voltage: 220V Working Current: 1.6A Maximum Power: 200W Maximum Current: 4A Lifespan: 100,000 Times Model: HT-800 Screw Thread: G1 Applicable Liquid: Water or Other Liquids with Similar Physical And Chemical Properties Fluid Pressure: 0.6Mpa Liquid Temperature: 70 Degree Celsius Size Details: Size: 7cm x 7cm/2.76" x 2.76" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Water Flow Switch