Expansion chamber for use with a pressure transmitter

Details Expansion chamber for use with a pressure transmitter Expansion chamber for use with a pressure transmitter

2007-04-06

2008-11-25

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S716000, C073S717000

Reexamination Certificate

active

07454975

ABSTRACT:
A pressure monitoring system provides a pressure sensor and a body that has a first coefficient of thermal expansion and includes at least one opening for accessing a process fluid. At least one isolation diaphragm is coupled to the body and positioned in the at least one opening. The at least one isolation diaphragm has a first surface in communication with the process fluid. At least one passageway is located in the body and configured to contain a fill fluid in communication with a second surface of the first isolation diaphragm. The at least one passageway is positioned between the first isolation diaphragm and the pressure sensor. At least one expansion chamber is coupled to the first passageway and includes an insert having a second coefficient of thermal expansion. The first coefficient of thermal expansion of the body is greater than the second coefficient of thermal expansion of the insert.

REFERENCES:
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patent: 7117745 (2006-10-01), Broden
patent: 7278318 (2007-10-01), Dannhauer et al.
patent: 1 400 797 (2003-09-01), None

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