– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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CCT Working Group for Non-Contact Thermometry (CCT-WG-NCTh)

Terms of reference:

The terms of reference of WG-NCTh are to study and advise the CCT on issues related to thermal radiation and other non-contact methods for temperature measurement.


  • Reviewing and reporting on measurements of T – T90 and fixed points by primary non-contact thermometry;

  • Reviewing the research and application of non-contact primary thermometers to realise the kelvin;

  • Coordinate activities related to high-temperature fixed points;

  • Provide appropriate input into the mise en pratique for the definition of the kelvin;

  • Provide, where required, input into the guides on thermometry;

  • Provide definitive guidance, when required, on the use of secondary non-contact thermometry methods (e.g. phosphor, gold-cup thermometry);

  • Support world-wide efforts in standardization of radiation thermometer and thermal imager testing and calibrations;

  • Develop appropriate uncertainty budgets for radiation thermometry;

  • Recommend key comparisons relevant to WG-NCTh to the CCT;

  • Develop, when required, guidance for measurement best practices in novel non-contact thermometry techniques (e.g. plasma and flame thermometry).

See also:

Declaration of CCT WG-NCTh concerning the realization of thermodynamic temperature by primary radiometry


  • Prof. Graham Machin  (NPL)


  • Dr Daniel Cárdenas-García (CENAM)
  • Dr Ferruccio Girard (INRIM)
  • Dr Jörg Hollandt (PTB)
  • Dr Maria-José Martin (CEM)
  • Dr Mikhail Matveyev (VNIIM)
  • Dr Mohamed Sadli (LNE-Cnam)
  • Dr Peter Saunders (MSL)
  • Dr Renato Teixeira (INMETRO)
  • Dr Andrew D. Todd (NRC)
  • Dr Eric van der Ham (NMIA)
  • Dr Li Wang (NMC, A*STAR)
  • Mr Yoshiro Yamada (NMIJ/AIST)
  • Dr Yongshim Yoo (KRISS)
  • Dr Howard Yoon (NIST)
  • Mr Zundong Yuan (NIM)
  • Co-opted members:
    Dr K. Anhalt (PTB), Dr H. McEvoy (NPL)

  • Co-opted Members for HTPF:
    Dr P. Bloembergen (NIM), Dr T. Wang (NIM), Dr B. Khlevnoy (VNIIOFI)

  • Observers:
    Dr E. Ejigu (NMISA), Dr O. Pehlivan (UME)

  CCT: Upcoming meetings
23–27 March 2020: 29th meeting of the CCT and related meetings

CCT summary
General information
CCT members
CCT publications and bibliography
CCT strategy
CCT working groups
Photographs of the CCT
Key comparisons
Classification of services in Thermometry
Open documents
CCT documents
CCT-WG-NCTh documents