Identification of measuring instruments

Identification of measuring instruments – for what purpose?

There are several purposes here, and they depend on the content of the identification of the measuring instrument.

A measuring instrument may be identified by:

  1. by its calibration status (as in the photo)
  2. by its marking, number

Variant 1

By means of the identification of a measuring instrument (MI) the user will always have a transparent overview on the serviceability of the used measuring instrument.

Variants 1 and 2

Information on identification is often required for traceability of measurements. The various reports should include information on which equipment the measurement was carried out (specify number) and what calibration status the MI had.

Identification of measuring instruments – in which processes?

There are usually a number of departments in the production plants which have measuring instruments in operation. It is reasonable to identify those that are used for:

  • monitoring of the conduct of the technological process
  • control of components (raw materials), control during the production process, control of finished products. Such measuring instruments will be available in production and quality control.
  • monitoring of environmental parameters (temperature, humidity) in cases where these parameters are critical to maintain or achieve product conformity. Identification of measuring instruments is applied to hygrometers, thermometers, psychrometers in storage areas.


How to apply identification?

The answer is simple – in a way to fulfil the objective. In other words, the identification must be clear and visible to the staff in charge of the measurement. An additional aspect: as applying identification is also an “intervention” in the equipment, it should be applied without risk of changing the characteristics of the measuring instrument (e.g. not taping the buttons, not applying the identification tag to the weighbridge, etc.). And it is also recommended that such identification should last until the time of its replacement by a new one, until the next calibration period.

And one more interesting point in the identification of the measuring instrument.

What is more important: to specify the last date of verification or calibration or the date of subsequent calibration? To be objective, true information that a measuring instrument is valid is only contained in the date of the last calibration. Based on risk analysis and regulatory requirements, it is possible to assess which calibration interval is the most appropriate.

Learn more about process interactions and risk management in our training on the requirements of ISO 9001IATF 16949.




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