High temperature pressure transmitter assembly
First Claim
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1. A pressure transmitter assembly for measuring a pressure of a process fluid, comprising:
- an isolation diaphragm assembly including an isolation diaphragm configured to couple to a process fluid along a process interface side and defining an isolated cavity opposite the process interface side;
a pressure sensor coupled to the isolation diaphragm assembly and physically spaced apart from the diaphragm assembly to provide thermal isolation from process fluid proximate the isolation diaphragm assembly; and
a conduit extending from the isolated cavity defined by the isolation diaphragm to the pressure sensor, the conduit configured to carry isolation fill fluid to thereby transfer a pressure applied to the isolation diaphragm to the pressure sensor.
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Abstract
A pressure transmitter assembly for measuring a pressure of a process fluid includes an isolation diaphragm assembly. A pressure sensor is spaced apart from the isolation diaphragm assembly to provide thermal isolation. A conduit extends from the isolation diaphragm assembly to the pressure sensor and is configured to carry isolation fill fluid.
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Citations
26 Claims
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1. A pressure transmitter assembly for measuring a pressure of a process fluid, comprising:
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an isolation diaphragm assembly including an isolation diaphragm configured to couple to a process fluid along a process interface side and defining an isolated cavity opposite the process interface side; a pressure sensor coupled to the isolation diaphragm assembly and physically spaced apart from the diaphragm assembly to provide thermal isolation from process fluid proximate the isolation diaphragm assembly; and a conduit extending from the isolated cavity defined by the isolation diaphragm to the pressure sensor, the conduit configured to carry isolation fill fluid to thereby transfer a pressure applied to the isolation diaphragm to the pressure sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of manufacturing a pressure transmitter for coupling to a high temperature process fluid comprising:
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providing an isolation diaphragm assembly including an isolation diaphragm configured to couple to a process fluid along a process interface side and defining an isolated cavity opposite the process interface side; providing a pressure sensor; affixing the pressure sensor to the isolation diaphragm assembly at a physically spaced apart position from the diaphragm assembly to provide thermal isolation from process fluid proximate the isolation diaphragm assembly; and coupling the isolated cavity defined by the isolation diaphragm to the pressure sensor with a conduit, the conduit configured to carry isolation fill fluid to thereby transfer a pressure applied to the isolation diaphragm to the pressure sensor. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification