Wika Alexander Wiegand Gmbh & Co.

Thorsten Seefried

Joachim Gareus

Udo H&ouml;rning

A membrane pressure sensor has a hollow space formed between a housing (,) and a cover (,), which is subdivided by two membranes (,) parallel to each other into a pressure sensing space (,) for impingement with a fluid with a pressure to be measured, into an air evacuation space between the membranes (,), and into a measurement fluid filled pressure output space (,) to forward the pressure to a pressure measurement arrangement (,), wherein the membranes (,) are made of a perfluoroalkoxy copolymer (PFA) and are designed shaped and congruent with the interposition of a plastic fiber insert (,). In this pressure sensor, the membrane (,) on the pressure sensing side is in direct contact with the cover (,), and an O-ring (,) is provided to seal the air evacuation space between the housing (,) and the cover (,). The housing (,) and cover (,) are made of a fluoropolymer. The pressure sensor is particularly suited for processes in which the entry a foreign metal ions into the test substance must absolutely be avoided.

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Klingenberg, Germany

Thorsten Seefried