Patent ID: 6311561
Filing Date: 2001-11-06
Classification: G01L,H01L

Abstract:
A pressure sensing device comprising:a housing defining a fluid channel therethrough;a circuit board mounted within the fluid channel;a pressure sensor attached to the circuit board, the pressure sensor generating a signal in response to a pressure sensed thereon and communicating the signal to the circuit board;a sealing member disposed on the circuit board and enclosing the pressure sensor;a diaphragm disposed on the sealing member defining an enclosed chamber between the diaphragm and the circuit board, the pressure sensor being within the enclosed chamber, and the diaphragm being positioned having one surface in the fluid channel;a pressure transmissive fluid filling the enclosed chamber such that a pressure applied to the diaphragm is transmitted by the pressure transmissive fluid and sensed by the pressure sensor; andthe circuit board, the sealing member and the diaphragm being compressively held together within the housing such that the enclosed chamber is sealed.