The SCHWAIGER® The water sensor is a flood and temperature sensor and can be operated with a battery or an external power supply unit (12 V, optional). The sensor can be installed on the floor or on the wall. It is equipped with an LED display and a siren. In the event of a flood, this sensor continuously issues an alarm. The LED display shows the flooding and the operating mode. The integrated tilt sensor detects tampering (e.g. in the event of theft).