Patent ID: 6609426
Filing Date: 2003-08-26
Classification: G01L

Abstract:
A pressure sensor comprising a sensor diaphragm, said sensor diaphragm having a portion with a first surface adapted to be exposed to a fluid under pressure, said portion of said sensor diaphragm having a second surface opposite said first surface and aligned with said first surface, said second surface bearing on a rigid support member which blocks movement of said second surface of said portion of said diaphragm due to the fluid under pressure,at least said portion of said sensor diaphragm being made of an electrically non-conducting elastomeric material wherein fine particles of electrically conducting material are homogeneously embedded and distributed in such a density that a compression of said portion of said sensor diaphragm caused by the fluid under pressure acting on said first surface and said rigid support member blocking movement of said second surface results in a measurable change in electrical resistivity of said portion of said sensor diaphragm, only said second surface of said portion of said sensor diaphragm being electrically contacted by at least a pair of electrical measurement contacts arranged on said second surface of said sensor diaphragm.