XH-M203 Water Level Controller Module 12V10A which has model number as XH-M203 and its operating and working voltage is AC/DC 12V and the output current capacity is 10A. Output type is a relay output and fully automatic control type. This Automatic water tank level controller Using 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 application, whenever the liquid level is at 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.