First results of flow meters calibrated in LNG test facility


VSL’s LNG Research and Calibration facility has delivered its first SI-traceable LNG flow meter calibrations results. A total of six flow meters from five leading flow meter manufacturers were calibrated in the test facility using liquid nitrogen.

Declaration of Equivalence


VSL, the Dutch Metrology Institute, and NIST, the American National Institute of Standards and Technology, are happy to announce the official signing of a new edition of our Declaration of Equivalence, by means of which both institutes recognize the equivalence of Primary Reference Materials prod



Door het vertrek van een van onze medewerkers is VSL op dit moment niet in staat om vochtkalibraties te verrichten tot kwartaal 2 van 2020. Momenteel wordt een nieuwe medewerker opgeleid op dit gebied.

Temperatuur laboratorium


Eind 2018 zijn de VSL laboratoria voor Temperatuur en Vocht verhuisd naar andere locaties binnen het Metrology Tower gebouw. Vanwege onverwachte laboratoriumcondities, hebben wij de heropening van het Temperatuurlab uit moeten stellen.

A new water calorimeter for modern radiotherapy


This new primary standard will definitely contribute to the safe introduction of future radiotherapy techniques”. This quote comes from our colleague Leon de Prez, who is defending his PhD Thesis on Thursday 26 September 2019 at Utrecht University.

Emissions and odours from materials 2019


During the 14th edition of the “Emissions and odours from materials 2019” Certech (October 8, 2019, Brussels, Belgium) Iris de Krom will present research results regarding CRMs for (semi-)VOCs in sorbent tubes For more information about the conference visit:

VSL at the International Conference on Mercury as a Global Pollutant


Preceding the 14th International Conference on Mercury as a Global Pollutant (ICMGP 2019) (8 – 13 September 2019, Krakow, Poland) VSL and partners host an expert workshop “Comparability of mercury measurements in air” (Sunday 7 September 2019 13:00 – 15:30).

Comparable measurement results for mercury in air


Robust, reliable and traceable measurements of mercury are essential to enable global efforts to reduce the concentration of mercury vapor in the environment, to comply with regulation and to protect human health.

Results VOC at Pittcon 2019


Volatile Organic Compounds (VOCs) are a group of organic chemicals that have low boiling points and high vapor pressures at ambient conditions.