Description:Built in pressure sensor, stable and accurate. MCU micro computer process chip, it can achieve safe and intelligent control. Automatically stops pump for water shortage and automatically works when water is supplied. Button operation, screen display of adjusted pressure, convenient and quick. Worth buying.Features:Automatically stops pump for water shortage and automatically work when water is supplied. MCU micro computer process chip, safe and intelligent control. Built in pressure sensor, stable and accurate. Water shortage automatic protection function to prevent water pump from burning out. Button operation, screen display of adjusted pressure, convenient and quick. Shock-proof proof, strong anti-interference, fast response, stable performance and long service life. Specification:Condition: 100% Brand NewWorking Pressure Range: 0-10 BarRelay Capacity: 220V AC 10AOutput Signal: active output, to provide pump 220V, start the pump below 1.5KW directlyFluid Temperature: 80 degreesInstallation Interface: G1/2Waterproof: IP65Long Life: can be used continuously for more than 20 million timesSocket Type: International three flat pins plugWiring:(3 wires)White: PositiveBlack: NegativeGreen, Yellow: GroundCable Length: Approx. 90cm / 35.4inchProduct Size: Approx. 85 x 112mm / 3.3 * 4.4inchPackage Weight: Approx. 421gPackage Weight:1 x Pressure SwitchInstallation Instructions:1. If the pump doesn't have a check valve, then a check valve must be installed in front of the pressure, in this case the pump may on/off, more frequently.2. When you turn on the tap water, if the is on/off time of pump is incorrect, please adjust the H valve to a larger valve.3. If the pump stops running, please lower the H valve, on the other hand, if the pump doesn't work, please set the L valve higher.Note:1. Please check the size measurement chart carefully before making payment.2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)3. The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.