Differential pressure sensor isolation in a process fluid pressure transmitter
US7624642B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Sep 20, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0645
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential pressure transmitter includes first and second process fluid inlets. A differential pressure sensor is disposed within the transmitter and has first and second sensor inlets. A first isolator diaphragm is located proximate the first process fluid inlet and is operably coupled to the first sensor inlet through a first fill fluid volume. A second isolator diaphragm is located proximate the second process fluid inlet and is operably coupled to the second sensor inlet through a second fill fluid volume. Measurement circuitry is operably coupled to the differential pressure sensor and configured to measure an electrical parameter of the sensor and provide an indication of the measured parameter. A third fluid volume substantially surrounds the differential pressure sensor. The third fluid volume exerts a compressive force on the differential pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.