Strouse, G.
(2007),
Standard Platinum Resistance Thermometer Calibrations from the Ar TP to the Ag FP, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.250-81
(Accessed October 8, 2025)
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Standard Platinum Resistance Thermometer Calibrations from the Ar TP to the Ag FP
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Abstract
The National Institute of Standards and Technology (NIST) is in charge of realizing, maintaining, and disseminating the international Scale of 1990 (ITS-90). The Standard Platinum Resistance Thermometer (SPRT) Calibration Laboratory of the NIST Thermometry Group realizes the ITS-90 from the argon triple point (Ar TP, 189.3442 °C) to the silver freezing point (Ag FP, 961.78 °C) for the calibration of SPRTs. This special publication describes the calibration services, methods, measurement assurance, and uncertainties for the NIST ITS-90 calibration SPRTs.Citation
Special Publication (NIST SP) - 250-81
Report Number
250-81
NIST Pub Series
Pub Type
NIST Pubs
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Keywords
Fixed-point cells, International Temperature Scale of 1990, ITS-90, Standard Platinum Resistance Thermometer, SPRT, SPRT Cal.
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Created December 19, 2007, Updated November 10, 2018