Knowledge
Metrology Dictionary
The complete VIM vocabulary — all numbered concepts of JCGM 200:2012 as faithful paraphrases with clause citations — plus clearly labeled practice terms from the GUM, ILAC, ISO and NIST guidance.
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.
ITS-90 · Temperature