Use a measuring instrument compliant with the requirements

Not just any measuring instrument can be used for purposes regulated by the Measuring Instruments Act. For example, ordinary kitchen scales cannot be used to weigh a product to determine its price.

Companies or other parties using the measurement results (such as a housing company or a municipal water supply and sewerage system) is responsible for ensuring that the commissioned measuring instrument or scales conform to the requirements and that their characteristics are suitable for their intended purpose and operating environment. The measuring instrument must be sufficiently accurate, reliable and durable for its intended purpose.

The most common scales and measuring instruments must fulfil the requirements of the Measuring Instruments Directive (MID) or the NAWI Directive. Approved instruments can be identified by their markings (Markings on measuring instruments, link to the new page at and the declaration of conformity provided with the instrument.

Measuring instruments other than the ones conforming to the directive must usually have either a Finnish or European type approval. Normally, these devices must be verified before commissioning. Such verification must be carried out by an inspection body approved by Tukes.

Examples of measuring instruments and the related requirements are listed in the table.

Information about the design and manufacturing of measuring instruments