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Terms of Reference

Working Group 8

The following terms of reference have been adopted for WELMEC WG 8 during the 31st WELMEC Committee meeting:

General application of Measuring Instrument Directive (MID) and Non-Automatic Weighing Instrument Directive (NAWID), except market surveillance (scope of WG 5), in particular with a view to establishing guidance documents on:

  • conformity assessment modules
  • appointment (criteria) of notified bodies
  • operation of notified bodies.  


In addition, WG 8 will take into account:

  • horizontal aspects of annex I of MID
  • MID categories of measuring instruments not covered by a specific WELMEC working group
  • the definitions of MID and OIML (clarification where differences appear between MID and OIML vocabulary)



The here under specific aspects in relation with MID are not in the scope of WG 8 but are dealt with by the following WELMEC WGs:

WG 2 : automatic weighing machines

WG 5 : market surveillance

WG 7 : software

WG 10 : measuring systems for liquids other than water

WG 11 : measuring instruments for utilities

WG 12 : taximeters


(May 2015)