Why is "ITS-90" trending?
Latest news, Wikipedia summary, and trend analysis.
Trend Analysis
- Ranking position: #
- Date: 2026-04-19 16:55:21
This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
Based on Wikipedia pageviews and search interest, this topic gained significant attention on the selected date.
Trend Insight
ITS-90 entered the ranking for the first time today at position #. This is its highest position ever recorded.
Trend History
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-04-19 and was most recently seen on 2026-04-19.
Wikipedia Overview
The International Temperature Scale of 1990 (ITS-90) is an equipment calibration standard specified by the International Committee of Weights and Measures (CIPM) for making measurements on the Kelvin and Celsius temperature scales. It is an approximation of thermodynamic temperature that facilitates the comparability and compatibility of temperature measurements internationally.
It defines fourteen calibration points ranging from 0.65 K to 1357.77 K
and is subdivided into multiple temperature ranges which overlap in some instances.
ITS-90 is the most recent of a series of International Temperature Scales adopted by the CIPM since 1927.
Adopted at the 1989 General Conference on Weights and Measures, it supersedes the International Practical Temperature Scale of 1968 and the 1976 "Provisional 0.5 K to 30 K Temperature Scale". The CCT has also published several online guidebooks to aid realisations of the ITS-90.
The lowest temperature covered by the ITS-90 is 0.65 K. In 2000, the temperature scale was extended further, to 0.9 mK, by the adoption of a supplemental scale, known as the Provisional Low Temperature Scale of 2000 (PLTS-2000).
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