Process fluid pressure sensing assembly for pressure transmitters subjected to high working pressure

  • US 9,459,170 B2
  • Filed: 09/26/2013
  • Issued: 10/04/2016
  • Est. Priority Date: 09/26/2013
  • Status: Active Grant
First Claim
Patent Images

1. A transmitter for measuring a process variable of a process field comprising:

  • a housing;

    a pipe flange coupled to the housing configured to mount the transmitter to an opening in a pipe;

    a probe extending from the flange and into pipe through the opening in the pipe;

    a pressure sensor mount in the probe having an aperture therethrough;

    a pressure sensor passing through and mounted to the aperture, the pressure sensor having an electrical characteristic that varies with applied pressure;

    an isolator plug in the probe configured to be exposed to a process fluid and having a cavity formed therein which carries the pressure sensor and the pressure sensor mount therein, the isolator plug having an isolation diaphragm disposed to contact the process fluid and a passageway fluidically coupled to the isolation diaphragm to convey process fluid pressure from the isolation diaphragm to the pressure sensor through an incompressible fluid; and

    wherein the pressure sensor mount is coupled to the isolator plug and has a non-circular shape when viewed along an axis of the aperture.

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