Measuring instruments directive
Encyclopedia
The Measuring Instruments Directive (2004/22/EC) is a directive by the European Union
European Union
The European Union is an economic and political union of 27 independent member states which are located primarily in Europe. The EU traces its origins from the European Coal and Steel Community and the European Economic Community , formed by six countries in 1958...

, which intends to create a common market for measuring instruments across the 27 countries of the EU. Its most prominent tenet is that all kinds of meters which receive a MID approval may be used in all countries across the EU.

The MID covers these measuring instruments:
  • Water meters
  • Gas meters and volume conversion devices
  • Active electrical energy meters
  • Heat meters
  • Measuring systems for the continuous and dynamic measurement of quantities of liquids other than water
  • Automatic weighing instruments
  • Taximeters
  • Material measures
  • Dimensioning systems
  • Exhaust gas analysers


Measuring instruments that comply with the MID bear:
  • the CE mark
  • a capital letter ‘M’ and the last two digits of the year of its affixing, surrounded by a rectangle
  • the identification number of the notified body involved in conformity assessment


The Measuring Instruments Directive has been published on 30 April 2004 in the Official Journal of the EU
Official Journal of the European Union
The Official Journal of the European Union is the official gazette of record for the European Union . It is published every working day in all of the official languages of the member states. Only legal acts published in the Official Journal are binding.It was first published on 30 December 1952 as...

, but not applied until after 30 October 2006 and there will be a 10 year long transition period. National implementations of the new legislation are currently in the works.

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