Standards Index · JCGM/BIPM

ITS-90 (1990)

The International Temperature Scale of 1990

OFFICIAL SOURCE ↗ FIND MENTIONS IN THE ATLAS

Status: Current
Publisher: JCGM/BIPM
Year: 1990
Discipline: Temperature

What it covers

The defined practical temperature scale: fixed points from 0.65 K upward and the interpolation instruments between them. Kept in force through the 2019 kelvin redefinition via the mise en pratique (MeP-K-19), with a mandatory Technical Annex and published T − T90 difference estimates.

Summary written for this index — consult the official text for normative requirements.

Related standards

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