Patent ID: 6662662
Filing Date: 2003-12-16
Classification: G01L

Abstract:
A pressure transmitter with an improved isolator system, comprising:a transmitter body having an external isolator rim around a shaped concavity that is liquidly coupled to a port internal to the transmitter through a passageway through the body, the concavity having a central backing plate region; an isolator diaphragm having a diaphragm rim sealed to the isolator rim and having a central diaphragm region overlying and spaced apart from the central backing plate region; isolator liquid between the isolator diaphragm and the shaped concavity and in the passageway; a pressure sensor receiving pressure from the port through a sensor tube with a first shaped end disposed in the port, the sensor generating a pressure output; a fill tube internal to the transmitter and adapted to seal off the isolator, the fill tube having a second shaped end disposed in the port; and the central backing plate region including an annular groove that intersects with passageway.