Apparatus for accurately measuring high temperatures

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865490

Smith, Douglas D ^[1]

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1. Knoxville, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 4525080
• OSTI ID: 865490
• Country of Publication: United States
• Language: English

Related Subjects

apparatus
accurately
measuring
temperatures
thermometer
furnace
temperaes
range
1800
degree
2700
comprises
broadband
multicolor
thermal
radiation
sensor
positioned
optical
alignment
blackbody
sight
tube
extending
valve-shutter
arrangement
chamber
containing
charge
pressure
gas
momentary
valve
shutter
allows
pulse
purge
air-borne
contaminants
permits
measure
emanating
radiation sensor
optical alignment
thermal radiation
pressure gas
accurately measuring
radiation emanating
tube extending
sensor positioned
accurately measure
shutter arrangement
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