measuring devices

Measuring devices or measuring instruments are used to determine geometric or physical quantities . They usually provide a quantitative statement about the quantity being measured using a scale or numerical display . Recording devices record the value directly onto paper or another permanent storage medium. This statement, the measured value , is expressed as the product of the numerical value and the unit . The fundamental measurement methods underlying them are described under "Measurement Technology ." General characteristics of measuring devices according to DIN 1319-1 are listed under "Measuring Instruments ." ^[1]

A measuring device is defined in the “Fundamentals of Metrology” in DIN 1319 as “the totality of all measuring instruments and additional devices for achieving a measurement result” and in the simplest case consists of a single measuring device.

Measuring instruments for performing measurements generally fall under the category of measuring equipment. When used for testing , they are also referred to as test equipment according to DIN 1319-2 . ^[2]

The measuring device may be malfunctioning , or the measured value may contain deviations ; these must be calculated or their magnitude estimated. Particularly precise measuring devices can be used for the calibration , adjustment , or verification of other measuring devices (see also " Measuring Equipment Monitoring" ). A measurement uncertainty can be specified for determined values.