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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
16 JUNE 2025
Density - EURAMET
7 new CMCs in density measurements have recently been published for Italy via EURAMET, in the field of Mass and related quantities.
16 JUNE 2025
CCM key comparison - Viscosity
The Final reports and results of the key comparisons CCM.C-K4.A and CCM.V-K4.B have recently been published in the KCDB. These comparisons on the kinematic viscosity of fluids were piloted by Centro Nacional de Metrologia (CENAM), Mexico and included participants from 12 state economies.
16 JUNE 2025
Supplementary comparison in Dimensional metrology - APMP
The Final report of the supplementary comparison APMP.L-S5.2.n01 has been approved and published in the KCDB. This is a comparison of for the calibration of parallel thread gauges piloted by National Institute of Metrology (NIM), China including participants from Thailand, Germany and Saudi Arabia.
11 JUNE 2025
Humidity - SIM
2 new CMCs in humidity measurements have recently been published in the KCDB for the United States via SIM, in the field of Thermometry.
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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
1227 key comparisons
26165 CMCs
737 supplementary comparisons