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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
1 DECEMBER 2025
Scheduled maintenance of the KCDB

The KCDB will undergo scheduled maintenance on 02 December 2025 from 11 am to 1 pm Paris time (UTC +1)
During this period, the webapp and API services will be temporarily unavailable. Normal service will resume immediately after the maintenance window.

We appreciate your understanding and apologize for any inconvenience.

2 DECEMBER 2025
Properties of detectors and sources - EURAMET
6 revised CMCs in the measurement of irradiance have been published in the KCDB for Germany via EURAMET, in the field of Photometry and Radiometry.
2 DECEMBER 2025
Electromagnetic fields - APMP
1 new and 1 revised CMCs in electromagnetic field measurements have been published in the KCDB for Japan and the Republic of Korea via APMP, in the field of Electricity and Magnetism.
28 NOVEMBER 2025
Radioactivity - APMP
4 first CMCs in radioactivity measurements have been published in the KCDB for India, via APMP in the filed of Ionizing Radiation.
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Statistics
AFRIMETS APMP COOMET EURAMET GULFMET SIM
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Currently in the KCDB there are
259 CIPM MRA participants
1255 key comparisons
26525 CMCs
765 supplementary comparisons