Metrology is the scientific study of measurement. It establishes a common understanding of units, crucial in linking human activities. Modern metrology has its roots in the French Revolution's political motivation to standardise units in France when a length standard taken from a natural source was proposed. This led to the creation of the decimal-based metric system in 1795, establishing a set of standards for other types of measurements. Several other countries adopted the metric system between 1795 and 1875; to ensure conformity between the countries, the Bureau International des Poids et Mesures (BIPM) was established by the Metre Convention. This has evolved into the International System of Units (SI) as a result of a resolution at the 11th General Conference on Weights and Measures (...
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CGKilogram.jpg
A computer-generated image of the International Prototype kilogram (IPK), which is made from an allo...
Metric seal.svg
Seal of the International Bureau of Weights and Measures (BIPM).
It represents an allegory of Scienc...
NIST-4 Kibble balance.jpg
The NIST-4 Kibble balance, which began full operation in early 2015 at the National Institute of Sta...
National measurement system overview (en).svg
Overview of the structure of a typical national measurement system
Traceability Pyramid.png
A pyramid showing the levels of metrology along with the way that traceability and calibrations run