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CIPM MRA PARTICIPANTS
All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
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CIPM MRA PARTICIPANTS
Calibration and Measurement Capabilities – CMCs
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Key and supplementary comparisons
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Added keywords act as an additional filter. Keywords separated by a space will be treated by the logical function AND automatically. You may also use OR. Keyword searches also find close matches. Placing quotation marks (") before and after the search word, e.g. "word", will allow for exact matches.

In case of multiple search, please use ADVANCED SEARCH.
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News
27 FEBRUARY 2026
Key comparison for abundance of ozone in dry air - CCQM
The Final report and new results issued from the continuous comparison BIPM.QM-K1 have recently been published in the KCDB, including the results from National Metrology Institute of South Africa (NMISA), South Africa in June 2023. This comparison underpins the determination of the concentration of ozone in air, a current health issue linked to air pollution.
27 FEBRUARY 2026
Temperature - GULFMET
A new CMC in temperature measurements has recently been published in the KCDB for Saudi Arabia via GULFMET, in the field of Thermometry.
27 FEBRUARY 2026
Dosimetry - APMP
3 new and 1 revised CMCs in dosimetry measurements have been published in the KCDB for the Republic of Korea, via APMP in the field of Ionizing Radiation. 
27 FEBRUARY 2026
Dosimetry - EURAMET
A revised CMC in dosimetry measurements has been published in the KCDB for France, via EURAMET in the filed og Ionizing Radiation.
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Statistics
AFRIMETS APMP COOMET EURAMET GULFMET SIM
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Currently in the KCDB there are
258 CIPM MRA participants
1263 key comparisons
26457 CMCs
766 supplementary comparisons