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Title: Apparatus for accurately measuring high temperatures

Abstract

The present invention is a thermometer used for measuring furnace temperatures in the range of about 1800/sup 0/ to 2700/sup 0/ 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.

Inventors:
Publication Date:
OSTI Identifier:
6338802
Patent Number(s):
US 4525080
Assignee:
The United States of America as represented by the Department of Energy
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 8 Feb 1983; Other Information: PAT-APPL-464839
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; FURNACES; TEMPERATURE CONTROL; THERMOMETERS; ACCURACY; TEMPERATURE MEASUREMENT; VERY HIGH TEMPERATURE; CONTROL; MEASURING INSTRUMENTS; 421000* - Engineering- Combustion Systems

Citation Formats

Smith, D D. Apparatus for accurately measuring high temperatures. United States: N. p., 1985. Web.
Smith, D D. Apparatus for accurately measuring high temperatures. United States.
Smith, D D. Tue . "Apparatus for accurately measuring high temperatures". United States.
@article{osti_6338802,
title = {Apparatus for accurately measuring high temperatures},
author = {Smith, D D},
abstractNote = {The present invention is a thermometer used for measuring furnace temperatures in the range of about 1800/sup 0/ to 2700/sup 0/ 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.},
doi = {},
url = {https://www.osti.gov/biblio/6338802}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {6}
}