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Bureau of Standards, Metrology & Inspection, M.O.E.A., R.O.C. LOGO

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What are the differences between metrology and legal metrology ?

  • Date:2008/01/31
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Metrology is the science of measurement that includes units of measurement and their standards, measuring instruments and their fields of application, and all theoretical and practical problems relating to measurement. Metrology is classified in three main fields: scientific metrology, industrial metrology and legal metrology.

Legal metrology is defined in the International Vocabulary of Legal Metrology as the part of metrology relating to activities which result from statutory requirements and concern measurement, units of measurement, measuring instruments and methods of measurement and which are performed by competent bodies.

A legal measuring instrument means a measuring instrument that is designated by the competent authority for use in trade, certification, official inspection and testing or environmental protection activities, or is related to public safety and/or medical and health care affairs. The quality and creditability of legal measuring instruments are therefore important to ensure effective application in these areas.

The Bureau is also responsible for metrology and legal metrology.To fulfill its functions in industrial and scientific metrology, the Bureau has initiated three projects on the establishment, maintenance and dissemination of national measurement standards: the National Measurement Laboratory Project implemented by the Center for Measurement Standards, Industrial Technology Research Institute; the Project on the Establishment of National Standards for Ionizing Radiation implemented by the Institute of Nuclear Energy Research under the Atomic Energy Council; and the Project on the Maintenance and Establishment of National Standard for Time and Frequency executed by the Telecommunication Laboratories of Chunghwa Telecom.

The presence of a national measurement system for weights and measuring instruments not only helps to unify Taiwan's metrological system by offering reliable calibration services to operators but also acts as an agency directly responsible for participating in international activities to align our standards with international standards.