Strong compatibility, can be used in conjunction with a variety of liquid level sensor.Strong protection, with waterproof pump idling protection and water level overflow detection output, with 4 hours overtime pumping alarm. Relay dry node output, can be applied to a variety of load control. Control of diversification, manual or automatic mode control of water pump. The installation is simple and convenient, the screw can be positioned and installed, and the electric box track can also be installed. Water level automatic control: water level is lower than the low position induction probe, automatically start the pump, the water level rises to high level, and automatically closes the pump. Idling delay pump: after starting, if the water supply pipe is detected without water, then delay 3-5 minutes to close the pump. During the pumping process, if the water flow stopped for more than 3 seconds, the pump was closed immediately. Automatic water source: after idling pump stop, start pumping once every two hours, until the water is full, pump stops. Manual automatic switching: K1 button to switch mode of work, red light to automatic mode, kill mode is manual mode. Non contact inductive probe: probe, strong anti-interference ability, sensitive induction, no contact with liquid, resistance, safety, environmental protection and no pollution. Application: Suitable for controlling radiotube, water pumps, etc, as it can achieve the automatic control of high and low water level as well as keep level stable. Type: Liquid Level Controller Input Voltage: AV100V-220V,50/60Hz Operating Voltage: DC12V Operating Current: Working current less than =110mA, Static consumption current less than =20mA Load Power: less than 1.6KW(Installation of AC contactor is needed for overloading or 3-phase pumps) Alarm