Patent ID: 7015704

Claim:
A water supply for sanitary devices, which is equipped with a sensor device ( 30 ) and is activatable without contact, comprising: (a) a first capacitor (C 1 ) having a first and second electrically conductive layer ( 32 and 41 ) and having a dielectric layer ( 43 ) positioned there-between; (b) a second capacitor (C 2 ) having a first and second electrically conductive layer ( 32 and 31 ) and having a dielectric layer ( 33 ) positioned there-between; (c) an AC voltage generator (G), which is electrically connected to the second layer ( 41 ) of the first capacitor (C 1 ), for coupling in an AC voltage signal (s 1 ( t )); and (d) a sensor amplifier (A) for amplifying an output signal (s 2 ( t )); and wherein the first layer ( 32 ) is shared by the two capacitors (C 1 and C 2 ) and comprises a shared electrically conductive absorption area ( 32 . 2 ) or is electrically or capacitively connected to said shared absorption area ( 32 . 2 ), which, upon approach or contact of an object ( 38 ) or a liquid, forms an additional capacitor (C 3 ) whose effective capacitance experiences a detectable change that is tapped at the second layer ( 31 ) of the second capacitor (C 2 ) in the form of a correspondingly changed output signal (s 2 ( t )).