Relay dry node output, can be applied to a variety of load control. Control of diversification, manual or automatic mode control of water pump. Water level automatic control: water level is lower than the low position induction probe, automatically the pump, the water level rises to high level, and automatically closes the pump. 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. The installation is simple and convenient, the screw can be positioned and installed, and the electric box track can also be installed. 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 stopped for more than 3 seconds, the pump was closed immediately., Manufacturer: Akfldms