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
18 MARCH 2024
Key comparison for abundance of ozone in dry air
New results issued from the continuous BIPM.QM-K1 comparison have recently been published in the KCDB, including the results obtained with EMPA (WMO) in June 2023, NIM (China) in October 2023, and NPL (United Kingdom) in June 2022.  This comparison underpins the determination of the concentration of ozone in air, a current health issue linked to air pollution.
18 MARCH 2024
Thermometry - EURAMET
5 new and revised CMCs in Temperature measurement have recently been published in the KCDB for Spain via EURAMET, in the field of Thermometry.
18 MARCH 2024
Thermometry - SIM
8 new and revised CMCs in Temperature measurement have recently been published in the KCDB for Canada via SIM, in the field of Thermometry.
18 MARCH 2024
Humidity - SIM
2 new CMCs for Hygrometers have been published in the KCDB for Brazil via SIM, in the field of Thermometry.
Statistics
Currently in the KCDB there are
250 CIPM MRA participants
1173 key comparisons
25891 CMCs
687 supplementary comparisons