Patent ID: 6422085
Filing Date: 2002-07-23
Classification: G01L

Abstract:
A relative pressure sensor comprising:a sensing element having a diaphragm with an external surface, wherein said external surface comes into contact with a medium under pressure in a measurement operation; and a housing having an interior space, a front portion, said front portion comprising a section which comes into direct contact with said medium under pressure in said measurement operation; an opening, said opening extending from said front portion into said interior space, said opening being closed by said diaphragm; and a bore extending from an outer surface of said housing to the interior space of the housing for guiding reference air into said interior space; and an open pore hydrophobic filter which closes said bore; wherein said filter is located in the front portion of said housing in good thermal contact to said section of the front portion which comes into direct contact with said medium in said measurement operation, and wherein said filter is highly heatconducting, so that the filter and the diaphragm are at the same or nearly the same temperature.