Patent ID: 9625335
Date: 2017-04-18
CPC Classifications: G01L

Claim:
1. A pressure sensor, comprising a pressure measuring cell; and a housing, said housing comprising a housing opening: said pressure measuring cell, comprising: at least one ceramic measuring membrane body, wherein the measuring membrane body has a pressure-dependently deformable measuring membrane; and at least one ceramic platform, wherein said measuring membrane body is connected with said platform along an annular, peripheral joint, wherein: said peripheral joint is formed as a welded connection between said measuring membrane body and said platform; said platform includes an annular membrane support, to which said measuring membrane body is secured by means of said peripheral joint; wherein said pressure measuring cell further includes a central transducer support, which is surrounded by said membrane support; wherein an end face of said transducer support includes at least one electrode, which faces said measuring membrane body, wherein said measuring membrane body includes an electrode, which faces said transducer support; wherein said transducer support is connected pressure-tightly with said membrane support along at least a second joint; wherein said pressure measuring cell includes a bearing surface for a sealing ring, wherein an axial projection of said bearing surface on a plane, in which said joint between said measuring membrane body and said platform is formed, surrounds said peripheral joint; wherein said bearing surface for a sealing ring is in a first plane, wherein said first lane is axially spaced from a second plane, in which an outer end face of said measuring membrane extends and, indeed, by at least one fourth diameter of said measuring membrane body; wherein said pressure measuring cell is held by said housing, and wherein said pressure measuring cell closes a housing opening, through which said pressure measuring cell communicates with an environment of said housing; wherein a sealing ring is clamped between a sealing surface surrounding said opening of said housing and said bearing surface of the pressure measuring cell, such that the joint is exposed to the environment of said housing.