On 20 May is World Metrology Day

The measurement science community is celebrating World Metrology Day on 20 May 2019.

This year the event is dedicated to 'The International System of Units - Fundamentally Better'.

In November 2018 the General Conference on Weights and Measures took a historic vote to make the SI units entirely determined by constants of nature.

On this year's World Metrology Day that vote - and the decades of hard work that contributed to it - become reality.



Accompanying the redefinition of the International System of Units (SI), on the 20th of each month we will be looking at one of the seven SI base units.

You'll be able to find out where it's used in everyday life, how it's defined now, and the changes that will come into force on 20 May 2019.

The SI unit of the month (20 April to 19 May) is the mole. read more >>

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TEM image of well-defined magnetic nanochains composed of many magnetic nanobeads – Creator: David Alterman*
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Project research enables improvements in the safe disposal of radioactive waste from decommissioned nuclear sites

Rows of yellow barrels of radioactive waste – ©iStock.com/wellphoto
GPS week rollover

6 April 2019

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