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KCDB Statistics
Number of key comparisons
  Currently 979 key comparisons are recorded in the KCDB
88 of them correspond to exercises prior to the implementation of the CIPM MRA, and were chosen as "Approved for provisional equivalence".
Number of supplementary comparisons
  Currently 501 supplementary comparisons are recorded in the KCDB
All of them but 27 are conducted by the Regional Metrology Organizations.
Participation in key comparisons
  Graph illustrating the participation in key comparisons: click here
These statistics are based on all key comparisons (finished, in progress, or planned) recorded in Appendix B. Laboratories non-participating in the CIPM MRA are not shown. Click here for more information about comparisons conducted by the BIPM.
Participation in supplementary comparisons
  Graph illustrating the participation in supplementary comparisons: click here
These statistics are based on all supplementary comparisons (finished, in progress, or planned) recorded in Appendix B. Laboratories non-participating in the CIPM MRA are not shown.
Distribution of Calibration and Measurement Capabilities (CMCs)
  Number of CMCs by metrology area and by country: click here

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The KCDB Newsletter is issued twice a year, in June and in December, with the aim to communicate on matters relevant to the CIPM MRA, the JCRB, and any other news concerning the content of the KCDB.

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