Case report

New Developments in High-Temperature Measurement Techniques

Jürgen Hartmann orcid.org/0000-0002-9645-5434 ; University of Applied Science Würzburg-Schweinfurt Ignaz-Schön-Str. 11, D- 97421 Schweinfurt, Germany

Abstract

Temperature can be measured via emitted thermal radiation of the measured object using Max Planck’s law of thermal
radiation, which describes the emission of thermal radiation as a function of temperature of an ideal black body. However, thermal
radiation measurement requires accurately calibrated detectors. The calibration of such detectors has been significantly improved in
the last years, yielding calibration uncertainties of the spectral responsivity of detectors down to 10-4 in National Metrology Institutes.
The paper briefly reviews the experimental and physical principles of optical temperature measurement via emitted thermal radiation
and then covers recent developments in calibration technologies. Finally, practical methods for transferring these low uncertainties
already achieved in the National Metrological Institutes to industry are outlined.

Keywords

cryogenic radiometer; photometry; radiometry; thermometry

Hrčak ID:

136853

URI

https://hrcak.srce.hr/136853

Publication date:

22.10.2014.

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