Directive 2014/32/EU. Measuring Instruments, Metrological Accuracy.
Measuring instruments must meet metrological accuracy requirements. IgeraIndustria guides on scope, accuracy classes, conformity assessment procedures, and compliance documentation.
MID Directive 2014/32/EU: metrological accuracy and category complexity
Manufacturers must ensure measuring instruments meet accuracy requirements per category. Scope interpretation, conformity assessment procedures, and notified body selection create compliance challenges.
11 categories
Measuring instruments defined by type (scales, meters, etc.). Category determines conformity procedures and accuracy requirements.
MPE limits
Maximum permissible errors defined per category. Testing must prove compliance. Measurement uncertainty analysis required.
Notified bodies
Required for Category III instruments. NANDO database lists qualified notified bodies per category.
10-year retention
Documentation of metrological testing and calibration. Regular verification cycles required.
Instant guidance on Directive 2014/32/EU compliance
Measuring instrument scope determination
Guidance on MID compliance.
Category classification and requirements
Guidance on MID compliance.
Metrological accuracy (MPE) requirements
Guidance on MID compliance.
Conformity assessment procedures
Guidance on MID compliance.
EC type examination process
Guidance on MID compliance.
Notified body selection
Guidance on MID compliance.
Marking and identification
Guidance on MID compliance.
Post-market surveillance requirements
Guidance on MID compliance.
Frequently asked questions
Which measuring instruments fall under Directive 2014/32/EU scope?+
Measuring instruments designed to determine a quantity (mass, volume, temperature, pressure, etc.). 11 categories defined: scales, meters, analyzers. Scope includes equipment designed for metrological use. Exclusions: equipment covered by specific EU Directives, specialized military/scientific instruments, certain portable instruments below thresholds.
What metrological requirements must measuring instruments meet?+
Accuracy class defined per instrument category. Maximum permissible errors specified (MPE). Environmental conditions for operation specified (temperature, humidity, pressure). Performance stability over time. Regular maintenance and calibration intervals defined. Traceability to international standards required.
What conformity assessment procedures apply?+
Module A (internal controls) for low-risk instruments. Module A + D (design + production QA) for medium-risk. Module B + C (EC type exam + production control) for high-risk Category III. Notified body involvement required for some categories.
What technical documentation must manufacturers retain?+
Design documentation, accuracy specifications, test reports, calibration procedures, metrological test data, declaration of conformity, EU type examination certificate (if applicable). Retained 10 years minimum post-production.
How are measuring instruments marked and sealed?+
CE mark, accuracy class, measurement units, identification number, manufacturer name/address, manufacturing year. Security seal required for certain categories to prevent tampering. Marks must be permanent, legible, and appropriately placed.
What ongoing compliance obligations exist post-market?+
Manufacturers must monitor compliance, investigate non-conformities, take corrective action. Notified body notifications required for serious non-compliance. Market surveillance by competent authorities includes periodic testing and verification of accuracy claims.
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