Patent ID: 6263739
Filing Date: 2001-07-24
Classification: G01L

Abstract:
Membrane pressure sensor with a hollow space formed between a housing (1) and a cover (2), which is subdivided by two membranes (6; 61, 62) parallel to each other into a pressure sensing space (24) for impingement with a fluid with a pressure to be measured, into an air evacuation space between the membranes (6; 61, 62), and into a measurement fluid filled pressure output space (13) to forward the pressure to a pressure measurement arrangement (10),characterized in that the membranes (6; 61, 62) are made of a perfluoroalkoxy copolymer (PFA) and are shaped congruently with the interposition of a flexible plastic fiber insert (63), that the membrane (61) on the pressure sensing side is in direct contact with the cover (2), and the membrane (62) on the fluid filling side is in direct contact with and sealed with an O-ring (5) which is compressed between the housing (1) and said membrane on the fluid filling side, that an O-ring (3) is provided and is radially compressed between the housing and the cover to seal the air evacuation space between the housing (1) and the cover (2), andthat the housing (1) and cover (2) are made of a fluoropolymer.