Pressure transimitter inside, stable and accuracy. Switch of the pump during water shortage and on with water. MCU micro computer process chip, secure and intelligent control. One-click set up on/off limit. 0-10 bar working pressure range, matching with all pumps. The digital pump switch has pressure transimitter inside, secure and intelligent control, one-click set up on/off limit. Features: Pressure transimitter inside, stable and accuracy. Switch of the pump during water shortage and on with water. MCU micro computer process chip, secure and intelligent control. One-click set up on/off limit. 0-10 bar working pressure range, matching with all pumps. Specifications: Material: Plastic Color: Yellow Working Pressure Range: 0-10 Bar, matching with all pumps Relay Capacity: 220V 10A Output Signal: Active output, to provide pump 220V, start the pump below 1.5KW directly Fluid Temperature: 80 degrees Waterproof: IP466 Long Life: Can be used continuously for more than 20 million times Socket Type: International three flat pins plug Wiring: 3 wires White: Positive Black: Negative Green&Yellow: Ground Cable Length: The Long one is 0.88m, the short one is 0.35m Item Size: 112 * 85 * 52mm / 4.41 * 3.35 * 2.05in Item Weight: 330g / 11.64ounces Package Weight: 373g / 13.16ounces Package Size: 150 * 100 * 90mm / 5.91 * 3.94 * 3.54in Installation Remarks: 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 ,ore frequently. 2. When you turn on the tap water, if the pump is on/off time to time, please adjust the H valve to a larger valve. 3. If the pump keep runs with stopping, please lower the H valve, on the other hand, if th epump doesn't work, please set the L valve higher. Note: 1. (IMPORTANT) Professional installation is highly recommended. 2. Please check the size measurement chart carefully. Packing List: 1 * Pressure Switch 1 * English User Maual