Legal Metrology is that part of metrology which is subject to legal/regulatory control. It is defined in the International Vocabulary of Legal Metrology as that 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.
Legal metrology provides regulations for the control of measurements and measuring instruments. Legal metrology provides protection of public safety, the environment, consumers, traders and is critical to fair trade.