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Massive change in definition of the International System of Units (SI) is underway, BSMI holds symposium on the trend of international metrology BSMI, MOEA May 21, 2018
Organization: Bureau of Standards, Metrology & Inspection, M.O.E.A., R.O.C.        Publish Date: 2018-07-30 11:24
The definition of the base unit of mass (kilogram), electric current (ampere), temperature (kelvin) and amount of substance (mole) under the International System of Units (SI) will undergo a drastic revision in the near future! Under this backdrop, the Bureau of Standards, Metrology & Inspection (BSMI) will hold a symposium on "2018 World Metrology Day-International Trend of Metrology" on May 21, 2018.

Themed "Constant Evolution of the International System of Units," the symposium features speeches that will be delivered by Dr. Wu Wen-Li from the United States' National Institute of Standards and Technology (NIST) and President of SEMI Taiwan Terry Tsao. Their insightful talks will help us understand better how the change of the SI will influence a country's commerce, technology development and civil welfare.

The International System of Units is the supporting backbone of our society, touching every part of daily life and technology. This year, redefinitions of kilogram, ampere, kelvin and mole are expected to be adopted at the 26th CGPM, marking a new stage in the development of civilization.

The current standard kilogram is the international prototype kilogram made in 1889. However, the prototype has lost about 50 micrograms of weight over the period of 130 years. Therefore, a new definition of kilogram will be based on the Planck constant (h), a quantum-mechanical quantity that is more stable. In the future, all of the International System of Units will be represented in physical constants so that the standard will remain constant regardless of time and place.
At the opening ceremony, BSMI Director General Liou Ming-Jong said that although a change of 50 micrograms might not affect daily life so much, but the transformation poses a great challenge for many industries, such as the precision industry whose products and global competitiveness rely heavily on precision.

In response to the redefinition of International System of Units, the BSMI is actively establishing a new corresponding measurement system. The provision of precise measurement data will help boost Taiwan's high-tech industry development as well as make Taiwan a more advanced society.

New technologies such as smart manufacturing (Industry 4.0), Internet of Things and Big Data all require the strong support of precision measurement technology and standard. The BSMI will continue to keep pace with the latest change in measurement and provide precise and reliable measurement assistance for all industries.

Agency in charge: Metrology Administration Department (4th Division)
Contact person: Mr. Liou, Bing-Yuan
Telephone: (02)2397-1326
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