20 May 2022

Metrology in the Digital Era

May 20 is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875. This treaty provides the basis for a worldwide coherent measurement system that underpins scientific discovery and innovation, industrial manufacturing and international trade, as well as the improvement of the quality of life and the protection of the global environment.

The theme for World Metrology Day 2022 is Metrology in the Digital Era. This theme was chosen because digital technology is revolutionizing our community, and is one of the most exciting trends in society today.

Across the world, national metrology institutes continually advance measurement science by developing and validating new measurement techniques at the necessary level of sophistication. The national metrology institutes participate in measurement comparisons coordinated by the Bureau International des Poids et Mesures (BIPM) to ensure the reliability of measurement results worldwide.

The International Organization of Legal Metrology (OIML) develops International Recommendations, which aim to align and harmonize requirements worldwide in many fields. The OIML also operates the OIML Certification System (OIML-CS) which facilitates international acceptance and global trade of regulated measuring instruments.

These international metrology systems provide the necessary assurance and confidence that measurements are accurate, providing a sound basis for global trade today and helping us to prepare for the challenges of tomorrow.

World Metrology Day recognizes and celebrates the contribution of all the people that work in intergovernmental and national metrology organizations and institutes throughout the year.

Message from the BIPM and BIML Directors
World Metrology Day
20 May 2022

Martin Milton
Director of the BIPM

Antoni Donelan
Director of the BIML

Metrology in the Digital Era

The adoption of digital technology is revolutionizing our community. It is improving processes and opening new opportunities. It is one of the most exciting trends in society today, typifying the rapid pace of change that we are experiencing every day.

One of the cornerstones of digital transformation is the open and transparent exchange of information. Whenever information is needed it must be easy to find and easy to access in a format that is both inter-operable and reusable. Data that meet these requirements are what are now known as being “FAIR”1. That is, they must be Findable, Accessible, Interoperable and Reusable. When these requirements are met, data can be recognized as being trustworthy and can underpin open data practices.

In order to maximize the efficiency with which information is used in the new digital world it is essential that all sources of information should not only be readable by humans but also be available in formats that can be read by machines. When this is the case, it might also be acted upon by machines (i.e. be “machine actionable”) and used as the basis for new applications of artificial intelligence.

The opportunities brought by digital transformation will be realized more quickly if the global quality infrastructure can be adapted to promote and use new digital technologies that generate and use data that is FAIR. Amongst the central components of the national and international quality infrastructure is metrology – the science of measurement and its application, which is already starting to support the requirements of the new digital economy.

A leading example of the actions to support the digital transformation is the work of the CIPM to develop an SI Digital Framework. This Framework will be based on a core representation of the SI including agreed formats for basic data elements including values, units and uncertainties based on the SI Brochure. It will enable the implementation of new services by the NMIs, the BIPM and related organizations that make best use of open data formats, software tools and services that build upon the SI core representation. Such services will enable data to be available for analysis, to improve the quality of data, and to improve data transparency. The outcome of the SI Digital Framework will be new digital applications developed and deployed in the broader metrology community and in research disciplines that rely on the SI.

The application of digital measurement frameworks to industry and consumers is integral to an inclusive and trusted digital transformation. The incorporation of digital principles and practices in documentary standards and technical regulations from the outset is an area that the OIML is examining. A digital certificate of conformity which adheres to the FAIR principles is part of this narrative. The digital transformation of metrology can bring many benefits to our community. For example, it can expedite time-to-market for measurement products and services and reduce delays associated with approval processes. In turn, this contributes to innovation, product agility, and sustainability.

For the BIPM and the OIML, the journey towards achieving the goal of digitalization will be twofold. We will transition our own activities and services, which will in turn provide the digital foundations for all users of measurement data. This is a journey that will be both progressive and fascinating, and one which we look forward to sharing with our stakeholders.

1  The application of the FAIR principles for data were endorsed by the G20 leaders in 2016 at the Hangzhou summit. See

Source: World Metrology Day