Physikalisch-Technische Bundesanstalt, Germany
Cesky Metrologicky Institut Brno, Czech Republic
Mittatekniikan Keskus, Finland
NPL Management Limited, United Kingdom
Turkiye Bilimsel ve Teknolojik Arastirma Kurumu, Turkey
VSL B.V., Netherlands
Instituto Nazionale di Ricerca Metrologica, Italy
Technische Universiteit Delft, Netherlands
Università degli Studi di Torino, Italy