Process fluid pressure sensing assembly for pressure transmitters subjected to high working pressure
AssigneeRosemount Inc.
InventorNicholas John Haywood
Life of this patent
Estimating the term…
Abstract
A pressure measurement assembly is provided. The assembly includes a pressure sensor mount having an aperture therethrough. A pressure sensor passes through and is mounted to the aperture. The pressure sensor has an electrical characteristic that varies with applied pressure. An isolator plug is configured to be exposed to a process fluid. The isolator plug has an isolation diaphragm disposed to contact the process fluid. A passageway is fluidically coupled to the isolation diaphragm to convey process fluid pressure from the isolation diaphragm to the pressure sensor through an incompressible fluid. The pressure sensor mount is coupled to the isolator plug and has a non-circular shape when viewed along an axis of the aperture.
Claims26
A pressure measurement assembly comprising:
- a pressure sensor mount 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 configured to be exposed to a process fluid, 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.
A pressure measurement assembly comprising:
- a first pressure sensor mount having a first aperture therethrough;
- a first pressure sensor passing through and mounted to the first aperture, the first pressure sensor having an electrical characteristic that varies with applied pressure;
- a second pressure sensor mount having a second aperture therethrough;
- a second pressure sensor passing through and mounted to the second aperture, the second pressure sensor having an electrical characteristic that varies with applied pressure;
- an isolator plug configured to be exposed to a process fluid, the isolator plug having a first isolation diaphragm disposed to contact process fluid and including a first passageway fluidically coupled to the first isolation diaphragm to convey process fluid pressure from the first isolation diaphragm to the first pressure sensor through an incompressible fluid, the isolator plug also having a second isolation diaphragm disposed to contact process fluid and including a second passageway fluidically coupled to the second isolation diaphragm to convey process fluid pressure from the second isolation diaphragm to the second pressure sensor through an incompressible fluid;
- and
- wherein the first and second pressure sensor mounts are coupled to the isolator plug and have a non-circular shape when viewed along an axis of the first aperture.
Dependencies are inferred from the claim text.