Metrology is the science of measurement.
According to the European Union, Metrology covers three main activities :
The
definition of internationally accepted units of measurement, e.g.
the metre.
The realisation of units of measurement by scientific methods, e.g. the realisation of
the metre by use of lasers. .
The establishment
of traceability chains by determining and documenting
the value and
accuracy of a measurement and disseminating that knowledge.
Categories of Metrology
Metrology is considered in three categories with different levels of complexity
and accuracy :
Scientific
metrology deals with the organization and development of measurement
standards and with
their maintenance (highest level).
Industrial
metrology has to ensure the adequate functioning of measurement
instruments used in
industry as well as in production and testing processes
Legal
metrology is concerned with measurements where these influence the
transparency of economic
transactions, health and safety.
Fundamental metrology has no international definition, but it signifies the
highest level of accuracy within a given field. Fundamental metrology may therefore
be described as the top level branch of scientific metrology.
Source : EUROMET
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