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2020 World Metrology Day series-- NML's impacts on 「Measurement for Global Trade」

May 20 is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875. The theme for World Metrology Day 2020 is Measurements for Global Trade, which was chosen to create awareness of the important role that measurement plays in facilitating fair global trade, ensuring products meet standards and regulations, and satisfying customer quality expectations.

To echo the landmark and historic changes of new SI in May 2019, NML is establishing the new standards for the definition of the kilogram, the ampere, the kelvin and the mole. The new systems include the X-ray-crystal-density (XRCD) method and a high-purity 28Si-enriched sphere for realizing the kilogram; a new primary acoustic gas thermometer for the redefinition of the kelvin in terms of the Boltzmann constant; an enhanced quantum Hall resistance system with NML’s Josephson voltage standard for being realized by Ohm’s law; and an isotope ratio measurement technology to support the redefinition of the mole.

NML, acting as a national metrology laboratory, continually advances measurement science by developing and validating new measurement techniques at the necessary level of sophistication. Taking the trade of natural gas in Taiwan as an example, NML has developed the standards of ultrasonic flowmeters, thermometers, and pressure gauges to provide domestic gas power plants a benchmark for the fair trade transaction of natural gas which accounts for the annual volume of 300 billion NT Dollars; the Specifications for Verification and Inspection of Diaphragm Gas Meters established by NML ensure the accuracy and fairness of 3.6 million gas meters and 70 billion gas transactions per year in the country. Taking the electricity pricing as an example, the"Single / Three-phase AC Power Measurement Standard" established by NML helps Taiwan Power Company (Taipower) to ensure the accuracy of various meters. According to the statistics, the annual revenue of electricity consumption of Taipower in 2018 was 569.8 billion NT Dollars. If the meter measurement has a difference of 0.2 percent, the electricity tariff could result in a maximum loss of 1.1 billion NT Dollars.

  • Last Updated:2021/01/27
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