We’ve put together a list of frequently asked questions on the Measuring Instrument Directive 2004/22/EC (MID). Learn the answers to questions such as:
- What does MID mean?
- What is the objective of MID?
- What does MID mean?
- What does MID regulate?
- What do “placing on the market” and “putting into use” mean?
- Which measuring instruments are subject to MID?
- Which electric meters fall within the scope of MID?
- Which electric meters fall outside the scope of MID?
MID is the abbreviation for Measuring Instruments Directive. It refers to Directive 2004/22/EC of the European Parliament and of the Council of 31 March 2004 on measuring instruments.
What is the objective of MID?
- EC wide regulation of market access for the effected measuring instruments
- Uniform product identification
- Reduced number of tests and test costs
- Competitive equality by placing strict demands on product quality
What does MID regulate?
MID deals with ten type of measuring instruments in the area of legal measurement engineering and defines basic, as well as measuring instrument-specific requirements. It makes the manufacturer responsible for initial placing on the market (distribution) and putting into use (initial start-up) within the EU. National law applies thereafter. The manufacturer must select one of the conformity assessment procedures specified in MID to this end, by means of which he assures compliance of the measuring instruments with MID under the supervision of a notified body. Only then may a measuring instrument which is subject to MID be placed on the market or put into use. Meters must be furnished with a declaration of conformity. This is frequently included in the operating instructions.
What do “placing on the market” and “putting into use” mean?
These terms are defined in the European Measuring Instruments Directive as follows:
- “Placing on the market” means making available for the first time in the European Community an instrument intended for an end user, whether for reward or free.
- “Putting into use” means the first use of an instrument intended for the end user for the purposes for which it was intended.
Which measuring instruments are subject to MID?
MID is applicable to water meters, gas meters and volume conversion devices, active electrical energy meters, heat meters, measuring systems for continuous and dynamic measurement of quantities of liquids other than water, automatic weighing instruments, taximeters, material measures, dimensional measuring instruments and exhaust gas analyzers.
Which electric meters fall within the scope of MID?
MID applies to, amongst others, active power meter for household, commercial and light industrial applications. The directive is applicable to electronic meters which are connected directly or via a transformer, as well as to mechanical induction meters.
Which electric meters fall outside the scope of MID?
MID does NOT apply to:
- Electric meters for heavy industry
- Measurement of reactive or apparent consumption
- Measuring transducers and tariff devices which are either integrated into the meter or included externally