A low voltage battery energized passive detection system generates a control signal in response to radiated heat from a human body part to energize, for settable periods of time water flow valves and ancillary equipment that may be associated with the act of washing. To minimize power demand, a programmable...http://www.google.fr/patents/US5086526?utm_source=gb-gplus-shareBrevet US5086526 - Body heat responsive control apparatus
