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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.

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News
4 JULY 2025
Electricity and Magnetism - APMP
16 new and 32 revised CMCs in Radio frequency measurements, DC voltage, current, and resistance, AC voltage, current, and power and Impedance up to the MHz range, have been published in the KCDB for China, Chinese Taipei, Republic of Korea and Hong Kong, China via APMP in the field of Electricity and Magnetism.
3 JULY 2025
Key comparison on absorbed dose to water - BIPM
The latest results from the continuous key comparison BIPM.RI(I)-K4 have been published in the KCDB, including those obtained with the National Institute of Standards and Technology (NIST), United States. This comparison consists of a series of bilateral comparisons of absorbed dose to water in Co-60 beams, supporting traceability and calibration services for radiotherapy applications.
1 JULY 2025
Supplementary comparison in Electricity and Magnetism - GULFMET
The Final report of the supplementary comparison GULFMET.EM-S8 has been approved and published in the KCDB. This is a comparison of for the calibration of 8½ digit multimeters piloted by Emirates Metrology Institute (EMI), United Arab Emirates including participants from 6 state economies.
1 JULY 2025
Dimensional metrology - SIM
1 revised CMC in dimensional metrology has been published in the KCDB for Mexico via SIM, in the field of Length.
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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
1228 key comparisons
26238 CMCs
740 supplementary comparisons