Apparatus for accurately measuring high temperatures

Patent · 01 January 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
• 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

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