Dissemination of thermodynamic temperature above the freezing point of silver

M. Sadli, G. Machin, K. Anhalt, F. Bourson, S. Briaudeau, D. del Campo, A. Diril, O. Kozlova, D.H. Lowe, J.M. Mantilla Amor, M.J. Martin, H.C. McEvoy, Maija Ojanen-Saloranta, Ö. Pehlivan, B. Rougié, S.G.R. Salim

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)


    The mise-en-pratique for the definition of the kelvin at high temperatures will formally allow dissemination of thermodynamic temperature either directly or mediated through high-temperature fixed points (HTFPs). In this paper, these two distinct dissemination methods are evaluated, namely source-based and detector-based. This was achieved by performing two distinct dissemination trials: one based on HTFPs, the other based on absolutely calibrated radiation thermometers or filter radiometers. These trials involved six national metrology institutes in Europe in the frame of the European Metrology Research Programme joint project 'Implementing the new kelvin' (InK). The results have shown that both dissemination routes are possible, with similar standard uncertainties of 1-2 K, over the range 1273-2773 K, showing that, depending on the facilities available in the laboratory, it will soon be possible to disseminate thermodynamic temperatures above 1273K to users by either of the two methods with uncertainties comparable to the current temperature scale.
    Original languageEnglish
    Article number20150043
    JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
    Issue number2064
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed


    • filter radiometer
    • high-temperature fixed points
    • radiation thermometer
    • thermodynamic temperature


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