Improving the realisation of the kelvin by multiple fixed-point radiation thermometry

Highly accurate and traceable high temperature measurements are critical to a number of European industries, including metallurgical industries, glass and fertiliser production. Currently, there are regional gaps in the dissemination of the temperature scale with primary techniques at high temperatures. The mise-en-pratique of the new definition of the kelvin (MeP-K) offers new possibilities to realise and disseminate thermodynamic temperature using multiple high-temperature fixed points to calibrate a radiation thermometer, which is then used as an interpolating instrument. This project aims to assist less experienced NMIs/DIs in radiation thermometry by providing the necessary knowhow for fabrication and utilisation of high-temperature fixed points and applying the multiple fixed point scheme for the realisation of the new kelvin and linking it to the international temperature scale.