The CCM was set up in 1980.
Present activities concern matters related to the realization and dissemination of the mass unit following the 2018 redefinition of the kilogram in terms of the Planck constant, establishment of international equivalence between national laboratories for mass and a number of related quantities (density, pressure, force, fluid flow, viscosity, hardness, gravitational acceleration) and advice to the CIPM on these matters.
CCM Task Group on the Phases for the Dissemination of the kilogram following redefinition
List of meetings
Meetings and related documents
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Beginning a new phase of the dissemination of the kilogram
Following completion of the first key comparison of realizations of the kilogram, CCM.M-K8.2019, the internationally coordinated dissemination of the kilogram is entering into a new phase. From 1 February 2021, the traceability of the mass unit to the Planck constant will be taken from the 'consensus value' of the kilogram.
Announcement of the 20th International Congress of Metrology (CIM 2021)
The 20th International Congress of Metrology, CIM 2021, will be held from 28-30 September 2021 in Paris (France). The congress will explore scientific and industrial challenges in the field of measurement through a varied programme.
BIPM Kibble balance makes significant progress towards realizing the new kilogram definition in 2019
Significant progress towards the completion of the BIPM Kibble balance for realizing the new kilogram definition has been made in 2019. The BIPM will participate in the first key comparison of realizations of the new definition of the kilogram, CCM.M-K8.2019.