Patent ID: 7311006

Claim:
A pressure sensor comprising: a case having a first side and a second side, wherein the case defines a first chamber filled with a pressure medium on the first side and a second chamber filled with the pressure medium on the second chamber, the case forms an introduction passage extending to the first chamber and the second chamber for introducing the pressure medium into the first chamber and the second chamber; a first diaphragm mounted to the first side of the case such that the first chamber is defined by the first side of the case and the first diaphragm; and a second diaphragm mounted to the second side of the case such that the second chamber is defined by the second side of the case and the second diaphragm; a sensing portion mounted to the case, wherein the sensing portion receives a first pressure from the pressure medium of the first chamber and a second pressure from the pressure medium of the second chamber and outputs a signal in response to a difference between the first pressure and the second pressure; and a sealing part disposed in the introduction passage such that the first chamber and the second chamber are separated from each other and from an outside of the case.