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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
18 APRIL 2025
Humidity - SIM
The first CMC in humidity measurements for Bolivia has recently been published in the KCDB via SIM, in the field of Thermometry.
18 APRIL 2025
Key comparison in measurement of radionuclides - CCRI
The final report and results of the key comparison CCRI(II)-K2.Pa-231 have recently been published on the KCDB. This is a comparison of the activity per unit mass of 231Pa solution in the field of Ionizing Radiation, coordinated by the National Physical Laboratory (NPL), United Kingdom and included participants from 6 state economies.
11 APRIL 2025
Fluid flow - EURAMET
6 modified CMCs in fluid flow measurements have recently been published in the KCDB for Austria, United Kingdom, Switzerland, and France via EURAMET in the field of Mass and related quantities.
10 APRIL 2025
Dimensional metrology - APMP
5 new and 2 modified CMCs in dimensional metrology, have recently been published in the KCDB for China and Thailand via APMP, 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
258 CIPM MRA participants
1221 key comparisons
26138 CMCs
731 supplementary comparisons