BEDEWING DETECTOR

PURPOSE:To maintain the output of a sensor after bedewing is eliminated by providing a timer circuit timing a specified time in correspondence to the output of a detection circuit and a generator circuit generating a detection signal according to the output of a sensor circuit and that of a timer circuit. CONSTITUTION:When bedewing does not occur, the sensor circuit 11 outputs a signal L. Since at that time a holding circuit is inoperable, the signal L is outputted from an OR circuit. In case of the bedewing of an object to be monitored, the sensor 11 detects the bedewing before it takes place, and outputs the signal H, which is outputted through the OR circuit 12. It outputs the signals H until time T2 passes after the signal H was inverted to a signal L. Since the time T2 is set longer than T1, the signal H is outputted before the object is bedewed. After the bedewing is eliminated, the signal H is inverted to the signal L.