Thermocouple for use in a hostile environment
US4776705A · kind A · utility
25Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1987 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Jun 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermocouple system for use in a high temperature reactor wherein a carbonaceous fuel is burned to produce a usable gas and a residual slag. The thermocouple is enclosed in a gas tight metal protection sheath which is inserted inside a multi-segment refractory thermowell. An annular space formed between the sheath and the thermowell is continuously purged with a minute quantity of a gas or a gaseous mixture. Gasification products from the residual slag, which are normally in a form that reacts with and destroys the thermocouple wires, are neutralized within the annular space by reaction with the purge gas mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.