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CIPM MRA PARTICIPANTS
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CIPM MRA PARTICIPANTS
Calibration and Measurement Capabilities – CMCs
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Key and supplementary comparisons
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News
11 FEBRUARY 2026
Time - APMP
2 new and 1 revised CMCs in Time measurements have been published in the KCDB for Hong Kong, China and Singapore via APMP, in the field of Time and Frequency.
11 FEBRUARY 2026
Key comparison for abundance of ozone in dry air - CCQM
The Final reports and new results issued from the continuous comparison BIPM.QM-K1 have recently been published in the KCDB, including the results from Instituto Nacional de Ecología y Cambio Climático (INECC), Mexico in October 2024. This comparison underpins the determination of the concentration of ozone in air, a current health issue linked to air pollution.
10 FEBRUARY 2026
Mass standards - APMP
6 first CMCs in mass standard calibration have been published in the KCDB for Sri Lanka via APMP, in the field of Mass and related quantities.
6 FEBRUARY 2026
Key Comparison in the measurement of radionuclides  - CCRI
The results of the key comparison CCRI(II)-K2.Tc-99 have been published in the KCDB. This is a comparison of activity concentration of Technetium-99 (Tc-99) solution in the field of Ionizing Radiation, Section II (Measurement of Radionuclides) co-ordinated by National Physical Laboratory (NPL), United Kingdom with 16 participants. Tc-99 is a long-lived beta emitting fission product which occurs in radioactive waste and in the environment.
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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
1263 key comparisons
26529 CMCs
766 supplementary comparisons