Branches of metrology: legal metrology, industrial metrology and scientific metrology The concept of metrology, often used for scientific or fundamental metrology, industrial metrology and legal metrology, has moved from mere theory to practice. If the requirement is industrial, users set their own adoption limits to meet a functional need. The end user must be able to implement the process as planned and analyzed, as it often contributes significantly to measurement uncertainty. The concept of legal metrology covers the various aspects of design, certification and control during operation of regulated measuring instruments. The Department of Metrology comprises the Department of Scientific Metrology, the Department of Industrial Metrology and the Department of Legal Metrology. It is very important to note that legal metrology affects not only the health sector, but also trade, the daily purchase of goods by weight, the purchase of fuel and the provision of utilities in the residential area. Virtually all countries offer this protection by including metrology in their legislation, hence the term “legal metrology”. Metrology, the science of measurements, is visited in Mexico by various public institutions and the middle and higher education sector, as well as by private organizations. The importance of metrology lies in the fact that without the reference framework provided by this field of knowledge, no initiative in the field of standardization would be possible. Legal, scientific or industrial metrology is a fundamental instrument of quality, as it guarantees the accuracy of measurements and is therefore one of the foundations on which industrial development and trade security are based. The first precursor of modern metrology in Mexico dates back to 1857, when the country introduced the metric system.
The Directorate General of Standardization (DGN) directly carries out activities focused on scientific, industrial and legal metrology and also coordinates the efforts of the federal public sector in this field. It is also responsible for: 1.- Authorization to use units provided for in other measurement sets (procedure SE-04-001). 2.- Approval of the model or prototype of measuring instruments and standards subject to the official Mexican standard (procedure SE-04-002). 3.- Approval of national measurement standards (procedure SE-04-003). 4.- Certification of official Mexican standards at the request of a party (measuring instruments) if there is no accredited and approved certification body (procedure SE-04-005). 5.- Approval of calibration laboratories and testing units for measuring instruments (procedure SE-04-007). 6.- Keep the national prototypes of the meter and the kilogram or transfer their custody to other institutions to better preserve them. 7.- Issuance of the list of measuring instruments whose initial, periodic and extraordinary inspection is mandatory, as well as amendments to the list of measuring instruments. 8.- Dissemination of the use and application of the General System of Units of Measurement (NOM-008-SCFI-2002). 9.- Publication of official Mexican metrology standards.
10.- Authorization of traceability to national and foreign standards. Legal metrology protects public safety, the environment, consumers and traders and is fundamental to fair trade. The measuring instruments are subjected to various tests to ensure compliance with the relevant technical and legal requirements. With regard to metrological verification requirements, in order to protect the public interest in measuring instruments, the Government, in particular the Ministry of Industry and Trade, should publish a set of standards specifying the technical and administrative requirements for measuring instruments subject to legal metrology. Industrial metrology: The objective is to promote the competitiveness of the industry by ensuring measurements by regularly calibrating their measuring instruments against the traceable standards of the International System of Units, accompanied by best measurement practices and procedures that affect the quality of goods and services. The International Organization of Legal Metrology (OIML) ensures the global harmonization of legal metrology procedures. Legal metrology is the part of metrology that is subject to legal/official control. At Masstech, we are an EMA accredited laboratory where we provide the best industrial measurement services for your mass and temperature measuring instruments, such as balance calibration, parallelepiped weight control or autoclave validation.
To learn more about our services, we invite you to contact us by phone. Legal metrology is the part of metrology (metrology) that refers to activities arising from legal requirements that apply to measurements, units of measurement, measuring instruments and measurement methods carried out by competent bodies.