Apparatus for accurately measuring high temperatures
US4525080A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Feb 8, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/0893
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is a thermometer used for measuring furnace temperaes in the range of about 1800.degree. to 2700.degree. C. The thermometer comprises a broadband multicolor thermal radiation sensor positioned to be in optical alignment with the end of a blackbody sight tube extending into the furnace. A valve-shutter arrangement is positioned between the radiation sensor and the sight tube and a chamber for containing a charge of high pressure gas is positioned between the valve-shutter arrangement and the radiation sensor. A momentary opening of the valve shutter arrangement allows a pulse of the high gas to purge the sight tube of air-borne thermal radiation contaminants which permits the radiation sensor to accurately measure the thermal radiation emanating from the end of the sight tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.