Radar probe controlling flushing in public convenience - has dual sensitivity stage switched automatically with delay in valve-actuation

摘要

A radar probe controls fittings in public conveniences. It triggers the flushing system automatically by monitoring the user. The radar probe (1) has two sensitivity stages. It automatically switches from the lower sensitivity stage when the appliances are being used to the higher sensitivity stage. There is a delay inserted between the radar probe and the control of the valve for the flushing system. The sensitivity switching module contains a threshold value switch which triggers the next time stage via a transistor operating the threshold value switch.