Systems for sensing pressure and temperature at a common location
US5123751A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A probe has an inlet and outlet by which a fluid flows over an optical sensing element in the sensing probe. Broad band optical radiation is supplied to the element and radiation transmitted through the optical sensing element is supplied to three photodiodes responsive respectively to radiation at different wavelengths. The transmission characteristic of the optical sensing element varies in different ways with change in temperature and pressure respectively. A store of temperature and pressure against amplitude of radiation at different wavelengths is addressed by the outputs of the photodiodes to give an indication of pressure and temperature at the sensing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.