CCM

Committee members

Consultative Committee for Mass and Related Quantities (CCM)

President

Dr P. Richard

CIPM Member

Executive Secretary

Dr H. Fang

BIPM

ALL MEMBERS

List of meetings

Meetings and related documents

Upcoming Meeting

CCM-WGH
  • 28
  • September
  • 2023

Past Meeting

19th meeting of the CCM
  • From 25 to 26
  • May
  • 2023

Past Meeting

CCM-WGS
  • 24
  • May
  • 2023

Past Meeting

CCM-TGPfD-kg
  • 24
  • May
  • 2023

Past Meeting

CCM-WGM
  • 23
  • May
  • 2023
All meetings

Working Groups

CCM-TGPfD-kg

CCM Task Group on the Phases for the Dissemination of the kilogram following redefinition

CCM-WGDV

CCM Working Group on Density and Viscosity

CCM-WGFF

CCM Working Group on Fluid Flow

CCM-WGFT

CCM Working Group on Force and Torque

CCM-WGG

CCM Working Group on Gravimetry

CCM-WGH

CCM Working Group on Hardness

CCM-WGM

CCM Working Group on Mass

CCM-WGPV

CCM Working Group on Pressure and Vacuum

CCM-WGS

CCM Working Group on Strategy and MRA coordination

Publications

Publications

Strategy documents

[CCM] CCM Strategy 2022-2032

[CCM] CCM-IAG Strategy for Metrology in Absolute Gravimetry

Dissemination process after the redefinition of the kilogram

[CCM] Dissemination from the Consensus Value for the Kilogram

[CCM] Note on the dissemination process after the redefinition of the kilogram

All publications

CCM-mission

Mission

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.

Nested Applications

News

NCSL International signs the Joint Statement of Intent on the digital transformation in the international scientific and quality infrastructure

NCSL International signed the Joint Statement of Intent in March 2023.

Dissemination of the kilogram from the second Consensus Value

The second Consensus Value, the internationally agreed mean of the kilogram realizations, will come into force on 1 March 2023. The final report of the most recent key comparison used for the 2023 calculation is available in Metrologia. 

Completion of the second key comparison of kilogram realizations

From September 2021 to January 2023, the BIPM organized the second CCM key comparison of realizations of the kilogram definition based on the fixed numerical value of the Planck constant, which came into force on 20 May 2019.

CIM 2023 - 21st International Metrology Congress

The 21st edition of the International Congress of Metrology - CIM 2023 - will be held in Lyon (France) from 7 to 10 March 2023.​​​​​​​

Human- and machine-readable key comparison reports using the PDF/A-3 format

The BIPM is pleased to announce the publication of the first key comparison report embedding machine-readable versions of the document.

Asset Publisher

Reports and announcements

Decisions of the CIPM (March 2023 - Session I)

Report of the 111th meeting of the CIPM (2022)

Resolutions adopted at the 27th meeting of the CGPM

CC survey on the digital transformation

A digital framework for realising the SI - a proposal for the metre

Decisions of the CIPM (June 2022)

BIPM Annual Review 2021/2022

Report of the 110th meeting of the CIPM (2021)

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