Features: 1.Principle: This sensing controller is based on the detection of the pool (water tower) water level to control the high current relay to achieve control of pumping water on the water. 2. Small size, easy wiring, low power consumption, large switching capacity, strong anti interference, high functional stability. 3.Automatic Function: Can stably realize the pool (water tower) when the water shortage automatically open the pump (solenoid valve) pumping water on the water, water full automatically stop the pump (solenoid valve). 4.Applicability: This controller is carefully developed according to the actual needs of water pumping in home factories and mines. 5.Easy To Use: The use of household electrical wire can replace the probe, the wire stripped about 2 cm, so that it becomes a bare wire into the water can be directly sensed. specification:Item Type: Water Level Controller Module Material: PCB Voltage: DC 12V Application: Switch Sensing Controller PackageList:1 x Switching Sensing Controller NoteThe product does not come with a probe, you do not need to buy a separate probe, you can replace the probe with a household wire, strip the wire about 2 cm, so that it becomes a bare wire into the water can be directly sensed.