Constant evolution of the International System of Units

Constant evolution of the International System of Units

Across the world, National Measurement Institutes (NMIs) work to advance measurement science by developing and validating new measurement techniques to ensure that accurate measurements can be made everywhere.

World Metrology Day, on 20 May, is an annual anniversary celebrating the science of measurement, its achievements and the passionate community working in this field.

This year's theme is 'constant evolution of the International System of Units'. The theme was chosen because in November 2018, the General Conference on Weights and Measures is expected to agree one of the largest changes to the International System of Units (known as the SI) since its inception. These changes are highly technical, and not expected to have immediate consequences to those outside the measurement science community. 

At the heart of the campaign: the poster
World Metrology Day is a worldwide event and an international effort.

Each year a Regional Metrology Organisation, selected in rotation, identifies a NMI to work with the International Bureau of Weights and Measures (BIPM) and the International Organisation of Legal Metrology (OIML) on the World Metrology Day poster design.

World Metrology Day 2018 is very special. It will be the starting point for the promotion of the redefined SI and this time it has been EURAMET's turn to identify a NMI: EURAMET conducted a competition amongst its members for the best poster design on the significance of the SI and its envisaged redefinition.

The design of METAS, the Swiss National Measurement Institute, was chosen from anonymised proposals by the jury of BIPM, OIML and EURAMET.