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Rare Earth Optical Temperature SensorA new optical temperature sensor suitable for high temperatures (greater than 1700 K) and harsh environments is introduced. The key component of the sensor is the rare earth material contained at the end of a sensor that is in contact with the sample being measured. The measured narrow wavelength band emission from the rare earth is used to deduce the sample temperature. A simplified relation between the temperature and measured radiation was verified experimentally. The upper temperature limit of the sensor is determined by material limits to be approximately 2000 C. The lower limit, determined by the minimum detectable radiation, is found to be approximately 700 K. At high temperatures 1 K resolution is predicted. Also, millisecond response times are calculated.
Document ID
20000025307
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Chubb, Donald L. (NASA Glenn Research Center Cleveland, OH United States)
Wolford, David S. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:209657
E-11970
NASA/TM-2000-209657
Funding Number(s)
PROJECT: RTOP 632-1A-1A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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