The DEVIreg™ 233 is an electronic thermostat designed to be flushmounted or wall-mounted in an installation box from the LK FUGA series. The thermostat is provided with a 1- pole switch and a floor sensor (wire) to measure and control the desired floor temperature. Alternatively an external room sensor can be used. The thermostat has a button to adjust the temperature setting with a scale from (0) 1 to 6.