Features 1、The liquid level controller is small and compact, with simple wiring and low power consumption. 2、9V‑12V power supply voltage, with large switching capacity, strong anti‑interference and high functional stability. 3、Can stably realize that the water pump is automatically turned on when the pool (water tower) is short of water, and the water pump is automatically stopped when it is full. 4、Household wires can replace the probe, no need to purchase separately, bare wires can be directly sensed. 5、The relay is closed when two of the upper, middle and lower probes are out of water, and the relay is disconnected when both the upper, middle and lower probes are soaked in water. Specification Item Type: Water Level Controller Module Material: PCB Purpose: According to the detection of the water level of the pool (water tower) to control the high current relay to achieve control Control Output: Current 0~10A Working Principle: The relay is closed when two of the probes in the upper s, z and lower x are out of water, and the relay is disconnected when the probes in the upper s z and lower x probes reach the water. Package List 1 x Module