– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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CCM Working Group on Pressure and Vacuum (CCM-WGPV)

Terms of reference (draft)

The CCM Working Group on Pressure and Vacuum (WGPV) is concerned with the metrology of gauge, differential and absolute pressure between 1 x 10-9 Pa and 1 x 1010 Pa (pressure and vacuum) as well as very low gas flow ("leaks").

The main tasks of the group are:

    To advise the CCM on issues related to pressure and vacuum metrology;

    To define and organize the CIPM key comparisons for establishing the equivalence of national primary standards for pressure and vacuum and very low gas flow at the highest accuracy level mainly to provide sufficient linkage between the RMOs and the CCM-WGPV;

    To encourage and, if requested, coordinate research and development in the field of pressure and vacuum metrology to meet the present and future needs of science, industry and society world-wide;

    To harmonize guidelines in the field of pressure and vacuum metrology related to the CIPM MRA.


  • CEM (Centro Español de Metrología)
  • CENAM (Centro Nacional de Metrología)
  • CMI (Czech Metrology Institute)
  • INRIM (Istituto Nazionale di Ricerca Metrologica)
  • KRISS (Korea Research Institute of Standards and Science)
  • LNE (Laboratoire National de Métrologie et d'Essais)
  • METAS (Federal Institute of Metrology METAS)
  • MSL (Measurement Standards Laboratory of New Zealand)
  • NIM (National Institute of Metrology)
  • NIS (National Institute of Standards)
  • NIST (National Institute of Standards and Technology, United States Department of Commerce)
  • NMC, A*STAR (Agency for Science, Technology and Research)
  • NMIA (National Measurement Institute, Australia)
  • NMIJ/AIST (National Metrology Institute of Japan, AIST)
  • NMISA (National Metrology Institute of South Africa)
  • NPLI (CSIR National Physical Laboratory of India)
  • NRC (National Research Council of Canada)
  • PTB (Physikalisch-Technische Bundesanstalt)
  • UME (National Metrology Institute of Turkey)
  • VNIIM (D.I. Mendeleyev Institute for Metrology)

  CCM: Upcoming meetings
16–17 May 2019: 17th meeting of the CCM
8–10 May 2017: 6th CCM International Conference on Pressure and Vacuum Metrology, Pereira, Colombia
11–12 May 2017: CCM WG PV Meeting, Colombia

CCM summary
General information
Members of the CCM
CCM working groups
CCM publications and bibliography
CCM Guidelines on final reports of comparisons
CCM strategy
Key comparisons
Open documents
CCM documents
CCM-WGG documents
CCM-WGH documents
CCM-WGPV documents
Workshop on the mise en pratique (Nov. 2012)