Patent ID: 6935180

Claim:
A sensor diaphragm comprising a plurality of diaphragm layers which are arranged in a mutually superposed relationship and which include a conveyor diaphragm ( 1 ), a first electrically conductive diaphragm layer ( 2 ) arranged therebeneath, an electrically insulating diaphragm layer ( 3 ) arranged therebeneath and a second electrically conductive diaphragm layer ( 4 ) arranged therebeneath, wherein the first and second conductive diaphragm layers ( 2 , 4 ) are separated from each other and electrically insulated by the electrically insulating diaphragm layer ( 3 ) and the second electrically conductive diaphragm layer ( 4 ) has through portions ( 7 ) which engage through openings ( 5 ) in the electrically insulating diaphragm layer ( 3 ) and through openings ( 6 ) in the first electrically conductive diaphragm layer ( 2 ) and the electrically insulating diaphragm layer ( 3 ) has portions ( 12 ) which engage through the openings ( 5 ) in the first conductive diaphragm layer.