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International Comparison on Thermal Conductivity Measurements of Insulating Materials by Guarded Hot Plate



Bruno Hay, Leonel Lira Cortes, Benoit Doucey, Jean Remy Filtz, Nikolay Sokolov, Clark Stacey, Robert R. Zarr, Jintao Zhang


An inter-laboratory comparison on thermal conductivity measurements of insulating materials is currently organized under the auspices of the Bureau International des Poids et Mesures (BIPM). Thermal conductivity measurements are carried out by seven National Metrology Institutes (NMIs) using Guarded Hot Plate apparatus according to the International Standard ISO 8302. These measurements are performed at 10 °C, 23 °C and 40 °C on resin-bonded glass fiber and expanded polystyrene boards. The same set of specimens circulates between the concerned NMIs and is thus successively measured by the participants. This international comparison is intended as a first stage (or pilot study) for future Key Comparisons between NMIs. The analysis of first results shows that the obtained values are, for any temperature, within a range of approximately  1.5 % (with the exception of two participants).
Proceedings Title
Thermal Conductivity 30/Thermal Expansion 18
Conference Dates
August 29-September 2, 2009
Conference Location
Pittsburgh, PA, US
Conference Title
30th International Thermal Conductivity Conference and 18th International Thermal Expansion Symposium


BIPM, expanded polystyrene, guarded hot plate, inter-laboratory comparison, mineral wool, national metrology institute, thermal conductivity, thermal insulation


Hay, B. , Cortes, L. , Doucey, B. , Filtz, J. , Sokolov, N. , Stacey, C. , Zarr, R. and Zhang, J. (2009), International Comparison on Thermal Conductivity Measurements of Insulating Materials by Guarded Hot Plate, Thermal Conductivity 30/Thermal Expansion 18, Pittsburgh, PA, US (Accessed May 28, 2024)


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Created September 1, 2009, Updated October 12, 2021