PRESSURE MEASURING APPARATUS Russian patent published in 2008 - IPC G01L19/00 G01L13/00 

FIELD: measuring instruments; pressure measurement.

SUBSTANCE: apparatus comprises a case wherein a substrate is disposed having a sensing element and electric leads. The case has a first cavity, enclosing said sensing element and communicating with a first pressure inlet channel, a second cavity, being hermetically separated from the first cavity and enclosing at least said electric leads, and a third cavity, being hermetically separated from the first and second ones and communicating with a second pressure inlet channel. The case consists of a first case-shaped part and a second one. In the area of mutual adjustment between the first and the second case-shaped parts there is a sealing hermetically separating the first cavity of the case from the second one. The sealing has a circular portion disposed in the area of mutual abutment between the first and the second case-shaped parts, and an inner portion providing a strip-type connection between the opposite sides of this circular portion and sealing an intermediate portion at the joint between the strip and a partition that is provided in the second case-shaped part and separates the first cavity of the case from the second one.

EFFECT: eliminating the relation between mechanical stresses arising in the structure.

11 cl, 8 dwg