The Measuring Instruments Directive (MID) 2014/32/EU is a New Approach Directive which applies to a large range of measuring instruments. Its goal is to create a single market in measuring instruments throughout the EU.

It establishes essential requirements for measuring instruments subject to legal metrological control in a Member State and the conformity assessment they must undergo before market placement.

Scope

The directive applies to devices and systems with a measuring function as defined in instrument-specific annexes MI-001 to MI-010:

• MI-001 - Water meters
• MI-002 - Gas meters and volume conversion devices
• MI-003 - Active electrical energy meters
• MI-004 - Heat meters
• MI-005 - Measuring systems for continuous and dynamic measurement of liquids other than water
• MI-006 - Automatic weighing instruments
• MI-007 - Taximeters
• MI-008 - Material measures
• MI-009 - Dimensional measuring instruments
• MI-010 - Exhaust gas analysers

Requirements

A measuring instrument must meet essential requirements laid down in Annex I and the relevant instrument-specific annex. These include:

• Allowable errors
• Reproducibility and repeatability
• Durability and reliability
• Protection against corruption
• Conformity evaluation

Demonstration of Conformity

Compliance is demonstrated by applying one of the conformity assessment procedures listed in the relevant annex for the instrument. Some assessments require the involvement of a Notified Body.

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