to BIPM.org
CIPM MRA PARTICIPANTS
All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
Menu
Login
CIPM MRA PARTICIPANTS
Calibration and Measurement Capabilities – CMCs
?
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.
Advanced search
Key and supplementary comparisons
?
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.
Advanced search
News
5 NOVEMBER 2026
Key comparison in dimensional metrology - CCL
The results of the key comparison CCL-K3.n01 have been published in the KCDB. This is a comparison on angle standards in the field of Length, coordinated by the National Research Council (NRC), Canada in which 10 state economies participated. 
5 NOVEMBER 2026
Key comparison in gases - CCQM
The results of the key comparison CCQM-K82.2023 have been published in the KCDB. This is a comparison on the measurement of methane in air in the field of Chemistry and Biology, coordinated by the BIPM including 11 participants.
5 NOVEMBER 2026
Key comparison in pressure - APMP
The results of the key comparison APMP.M.P-K4 linked to CCM.P-K4.2012 have been published in the KCDB. This is a comparison on pressure measurements in gas piloted by the Korea Research Institute of Standards and Science (KRISS) with 6 participants.
3 NOVEMBER 2026
Key comparison in thermometry - SIM
The Final report of the key comparison SIM.T-K9.4 linked to CCT-K9 has been published in the KCDB. This is a bilateral comparison on the realization of the ITS-90 of the triple point of Argon in the field of Thermometry between NIST, United States and NRC, Canada.
See all news
Statistics
AFRIMETS APMP COOMET EURAMET GULFMET SIM
No content
Currently in the KCDB there are
263 CIPM MRA participants
1290 key comparisons
26459 CMCs
783 supplementary comparisons