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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
15 APRIL 2026
Scheduled maintenance of the KCDB
Please note that the KCDB web application will be unavailable due to scheduled maintenance on 16 April 2026 from 12:00 to 14:00 Central European Time (UTC +1).
15 APRIL 2026
Key comparison in fluid flow - APMP
The Final report of the key comparison APMP.M.FF-K3.2020 has been approved and published in the KCDB. This is a comparison on air speed measurements using an ultrasonic anemometer as transfer standard in the field of Mass and related quantities in which seven state economies participated.
15 APRIL 2026
Key comparison in gases - CCQM
The Final report of the key comparison CCQM-K82.2023 has been approved and published in the KCDB. This is a comparison on the determination of amount fraction of methane in air in the field of Chemistry and biology in which 12 state economies participated.
14 APRIL 2026
Dosimetry - COOMET
A new CMC in dosimetry measurements has been published in the KCDB for Uzbekistan via COOMET, 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
258 CIPM MRA participants
1266 key comparisons
26403 CMCs
769 supplementary comparisons