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World Metrology Day

World Metrology Day celebrates the signature by representatives of seventeen nations of the Metre Convention on 20th May 1875.  The Convention is the second oldest intergovernmental treaty arrangement and set the scene for what is now 130 years of achievement and success in the establishment of a global infrastructure for precise, accurate and traceable measurement. The original aim of the Metre Convention - the worldwide uniformity of measurement - remains as important today, as it was in 1875.  More, the work of the Convention now extends to a much greater number of international measurement standards and is making its presence felt in fields as diverse as biological standards and nanotechnologies.  In honor of the contribution of the Metre Convention the 21st CGPM, in October 1999, appointed 20th May as "World Metrology Day", a day which has been celebrated since then annually.

World Metrology Day recognizes and celebrates the contribution of all the people that work in intergovernmental and national organizations throughout the year.  We celebrate the 20th May as a day on which metrologists can be proud of their quiet, largely unseen, but influential achievements.  They can look back on a successful past, and look forward to another 130 or more years of service to the scientific, technical, commercial, and social applications of precise, traceable measurements within the International System of units (SI).  Across the world, national metrology institutes continually advance measurement science by developing and validating new measurement techniques at whatever level of sophistication is needed.


Themes and Posters

  • for 2019 The International System of Units Fundamentally better
  • for 2018 Constant evolution of the International System of Units
  • for 2017 Measurements for transport
  • for 2016 Measurements in a dynamic world
  • for 2015 Measurements and Light
  • for 2014 Measurements and the Global Energy Challenge
  • for 2013 Measurements in Daily Life
  • for 2012 We Measure for Your Safety
  • for 2011 Measurements in Chemistry~Chemical Measuremetns for Our Life, Our Future
  • for 2010 Metrology -- Measurements in Science and Technology
  • for 2009 Metrology -- Measurements in Commerce.jpg
  • for 2008 Metrology -- Measurement in Sport.jpg
  • for 2007 Measurements in Our Environment
  • Theme for 2006 A World of Metrology at the Service of the World
  • Theme for 2005 Global Confidence Through SI Traceability
  • Theme for 2004 What is Metrology  
  • Last Updated:2021/01/04
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