Realisation of the redefined kelvin

Project: EU project

Project Details


Bringing the new kelvin into a reality by primary thermometry while extending the life of the current scales.

In the redefined SI, the kelvin is defined in terms of a fixed value of the Boltzmann constant. Thus, practical methods to realise the kelvin in different temperature ranges need to be developed.

Project aims to turn the redefinition of the kelvin into a reality by developing primary thermometry.

VTT MIKES develops new Coulomb blockade thermometers (CBTs) optimized for the temperature range 1–25 K and demonstrates the dissemination of the kelvin by CBT in cooperation with an industrial partner.

Call 2018: SI Broader Scope

This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.
Effective start/end date1/09/1931/03/23

Collaborative partners

  • National Physical Laboratory (NPL) (lead)
  • BA66 National metrology institute VTT MIKES
  • Centro Español de Metrología (CEM) (Project partner)
  • Czech Metrology Institute (CMI) (Project partner)
  • Centro Nacional de Metrología (CENAM) (Project partner)
  • National Metrological Institute (INRIM) (Project partner)
  • Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research (Project partner)
  • Instituto Português da Qualidade (IPQ) (Project partner)
  • Laboratoire National de Métrologie et d’Essais (LNE) (Project partner)
  • German National Metrology Institute (PTB) (Project partner)
  • Slovak Institute of Metrology (SMU) (Project partner)
  • TÜBİTAK National Metrology Institute (UME) (Project partner)
  • University of Ljubljana (Project partner)
  • Aalto University (Project partner)
  • Fondazione Bruno Kessler (FBK) (Project partner)
  • Helmut-Schmidt-University (Project partner)
  • University of Warsaw (Project partner)
  • National Institute of Metrology China (Project partner)
  • Technical Institute of Physics and Chemistry (TIPC), CAS (Project partner)
  • The All-Russian Research Institute for Optical and Physical Measurements (VNIIOFI) (Project partner)


  • EURAMET e.V.


  • primary thermometry
  • Coulomb blockade thermometer