Dictionary · Temperature

Standard platinum resistance thermometer (SPRT)

The interpolation instrument of the ITS-90 between defined fixed points over most of its range: a strain-free platinum resistor whose resistance ratio W(T) maps to temperature.

Source: ITS-90
Discipline: Temperature

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Related terms

ITS-90

The International Temperature Scale of 1990: defined fixed points (e.g. the triple point of water, 273.16 K) and specified interpolation instruments through which practical temperature measurement is realized worldwide.

CCT / BIPM