Interchangeable differential, absolute and gage type of pressure transmitter
US6473711B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1999 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Aug 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87249
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure transmitter with first and second absolute pressure sensors receives process pressures from corresponding first and second process inlets. A transmitter circuit coupled to the first and second absolute pressure sensors generates a differential pressure type output. A third absolute pressure sensor coupled to the transmitter circuit receives atmospheric pressure from a third inlet. The transmitter circuit generates a second type of transmitter output that can be a gage or absolute pressure type. Single crystal. sapphire pressure sensors are preferred to provide enough accuracy for measuring accurately over 200:1 pressure range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.