XH-M203 Water Level Controller Module 12V10A which has model number XH-M203 and its operating and working voltage is AC/DC 12V and the output current capacity is 10A. The output type is a relay output and fully automatic control type. This Automatic water tank level controller Uses a relay and the input of two sensors (max-limit and min-limit sensors), this module is capable of switching devices on and off accordingly. It is ideal for applications where one needs to control the liquid level of a tank. In such an application, whenever the liquid level is at a minimum, the min-limit sensor should trigger the relay powering the pump on and filling the tank with the liquid. Once the liquid level has reached the maximum level, the max limit should trigger the module and make the relay switch the pump off, and so on.