Measuring Instruments Directive (MID)

Directive 2014/32/EU on measuring instruments specifies in detail the essential requirements the product needs to meet in order for the manufacturer to affix the CE marking.

The Directive covers the following measuring devices and systems: water meters, gas meters and volume conversion devices, active electrical energy meters, thermal energy 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 analysers.

The essential requirements are listed in Annex I to the Directive, while specific requirements for each type of measuring instrument are presented in the 10 sector-specific annexes (MI-001 to MI-010).

Before proceeding with the assessment procedure, it is important to determine whether you, the manufacturer, can assess your product by yourself or whether you have to involve a Notified Body.

When dealing with measuring instruments, the manufacturer is allowed to choose between assessment procedures stipulated in Annex II to the Directive.

A Notified Body verifies the compliance of a product by conducting a conformity assessment. It also ensures that the technical documentation sufficiently supports product compliance. If the Notified Body is involved in the production control phase, its identification number will be listed after the CE marking.

When the Notified Body is convinced of product’s compliance, it will issue a certificate of conformity to confirm this. The manufacturer will then draw up a Declaration of Conformity (DoC) to declare that he is solely responsible for the product’s conformity to the relevant Directive. The establishment of the DoC is a legal obligation.

The Declaration of Conformity must include the manufacturer’s details, such as name and address, essential characteristics the product complies with, any European standards and performance data and the identification number of the Notified Body, as well as a legally binding signature on behalf of the organisation.

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