Feature:1. The liquid level controller is small and compact, with simple wiring and low power consumption.2. 9V12V power supply voltage, with large switching capacity, strong antiinterference 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 ModuleMaterial: PCBPurpose: According to the detection of the water level of the pool (water tower) to control the high current relay to achieve controlPower Supply Voltage: 9V-12V (AC or DC)Control Output: Current 0~10AControl Power: 0~1KW/220V (theoretical maximum can control 2KW)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 ModuleNote:The probe is a wire with a plastic mesh shell to buckle the wire end, which can be directly sensed with a household wire. Strip the wire end about 5cm to make it a bare wire for direct sensing. For longer durability, it is recommended to connect a bit of stainless steel where the thread contacts the water.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.