1、Better for Control: Supports manual or automatic mode for the control of the water pump, with relay dry node output, and can be used on various load control. 2、Wide Compatibility: The water level controller module can be used in conjunction with various liquid level sensors, highly compatibility and very efficient. 3、Faster in Response: Thanks to the excellent workmanship, the water level controller module can give timely response in controlling your pump, very reliable. 4、Good in Protection: Equipped with waterproof pump failure protection and water level overflow detection output, the controller module will improve the safety. 5、Simpler to Install: Light in weight and compact in size as well, the pump water level module is very convenient to install within several minutes. Item Type: Water Level Controller Module Module Function: 1. Automatically pump water when the water level is below probe B. 2. When the water level gets to the C probe, stop pumping. 3. The A, B and C water level detection lines can be used together with ordinary wires, with the end of the wire exposed by 5cm. Automatic pumping when the water level is below point B. 1 x Water Level Controller Module