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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
CMC statistics
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
5 JUNE 2025
Key comparison in voltage - BIPM
The most recent results of the continous key comparison BIPM.EM-K11 have been published in the KCDB including the results obtained with Service de la Métrologie Belge (SMD), Belgium. This is a continuous bi-lateral comparison of voltage measurements at 1 V and 10 V in the field of Electricity and Magnetism in which 26 state economies have participated.
4 JUNE 2025
Frequency - APMP
9 new CMCs in Frequency measurements have recently been published in the KCDB for India via APMP, in the field of Time and Frequency.
4 JUNE 2025
Dimensional metrology - APMP
3 new and 1 revised CMCs in dimensional metrology have recently been published in the KCDB for China via APMP, in the field of Length.
4 JUNE 2025
Dosimetry - AFRIMETS
A new CMC in Dosimetry measurements has recently been published in the KCDB for Egypt via AFRIMETS, in the field of Ionizing Radiation.
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Statistics
AFRIMETS APMP COOMET EURAMET GULFMET SIM
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Currently in the KCDB there are
257 CIPM MRA participants
1225 key comparisons
26166 CMCs
737 supplementary comparisons