On 27 April 2023, a COOMET webinar "Implementation of the new definition of the temperature unit – Kelvin" was held, where members of TC 1.10 "Thermometry and Thermal Physics" and other specialists from COOMET member countries (Armenia, Belarus, Kazakhstan, Russia, Tajikistan, Turkey, Uzbekistan) took part. Leading specialists of VNIIM and VNIIFRTI (Russia) acted as speakers at the webinar.

The webinar program included the following issues:

• The redefinition of the Kelvin and its consequences in temperature measurement practice (speaker – A.Pokhodun, VNIIM);
• Realization at VNIIM of a new definition of Kelvin in the range above 961.78 ºС (speaker – V.Fuksov, VNIIM);
• The practice of using high-temperature fixed points in the implementation of a new definition of Kelvin by the method of conditional primary thermometry (speaker – Y.Sild, VNIIM);
• Realization and research of the temperature of the triple point of carbon dioxide (speaker – N.Beketov, VNIIM);
• VNIIFTRI relative acoustic gas thermometry equipment in the range from 4.2 K to 80 K (speaker – V.Kytin, VNIIFTRI).

This webinar provided an opportunity to exchange views on the technical implementation of the new definition of the temperature unit, on the technical and methodological implementation of the temperature unit transfer from the standard to working temperature measuring instruments, on the possibility of joint use of the thermodynamic temperature scale and ITS-90, as well as other actions relating to the implementation of the new definition of the temperature unit according to the resolutions of the General Conference on Weights and Measures (https://www.bipm.org/en/committees/cg/cgpm).

The presentations (in Russian) of the training can be found here.
The video of the training is available at https://drive.google.com/file/d/1giidHj1PdSLwIVLan3WJX5rmhiNQRFcA/view?usp=share_link