Patent ID: 6675654
Filing Date: 2004-01-13
Classification: B01D

Abstract:
A relative pressure sensor for capturing a measured pressure with respect to a reference pressure, comprising:a sensor element having a base body and a measurement diaphragm which, along its edge region, is connected in a pressure-tight manner to the base body so as to form a reference pressure chamber, the measurement diaphragm having a first diaphragm surface, which faces away from the reference pressure chamber and can be exposed to the measured pressure, and a second diaphragm surface, which faces the reference pressure chamber; a reference pressure path which extends between a surface which can be exposed to the reference pressure and an opening in the reference pressure chamber, with the result that the second diaphragm surface can be exposed to the reference pressure; and a filter element which is arranged in the reference pressure path; wherein the filter element comprises hydrophobic or hydrophobicized, nanoporous material.