Metrology
Metrology is the science of measurement. Metrology includes all theoretical and practical aspects of measurement. The word comes from Greek μέτρον (metron), "measure" + "λόγος" (logos), amongst others...
Metrology - Wikipedia
Measurement
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Standard (metrology)
In the science of measurement, a standard is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference...
Standard (metrology) - Wikipedia
History of measurement
 This article incorporates public domain material from websites or documents of the National Institute of Standards and Technology.As civilization developed, so too did the need for unit...
History of measurement - Wikipedia
Standards organizations
A standards organization, standards body, standards developing organization (SDO), or standards setting organization (SSO) is any organization whose primary activities are developing, coordinating, pr...
Standards organizations - Wikipedia
Korea Research Institute of Standards and Science
The Korea Research Institute of Standards and Science (KRISS) is the national measurement standards laboratory for the Republic of Korea. It is a government-funded institute responsible for providing ...
Optical comparator
An optical comparator (often called just a comparator in context) is a device that applies the principles of optics to the inspection of manufactured parts. In a comparator, the magnified silhouette o...
Optical comparator - Wikipedia
Natural units
In physics, natural units are physical units of measurement based only on universal physical constants. For example the elementary charge e is a natural unit of electric charge, and the speed of light...
Radian
The radian is the standard unit of angular measure, used in many areas of mathematics. An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle, one...
Radian - Wikipedia
Bya
In astronomy, geology, and paleontology, bya or "b.y.a." is an initialism for billion years ago. This abbreviation is commonly used as a unit of time to denote length of time before the present. Speci...
Abampere
The abampere (abA), also called the biot (Bi) after Jean-Baptiste Biot, is the basic electromagnetic unit of electric current in the emu-cgs system of units (electromagnetic cgs). One abampere is equa...
Spatially Encoded Arrangement for SPIDER
Spatially Encoded Arrangement for SPIDER (SEA-SPIDER) is an advancement of Spectral phase interferometry for direct electric-field reconstruction (SPIDER). The spectral phase of an ultrashort laser pu...
Spatially Encoded Arrangement for SPIDER - Wikipedia
Loadpin
A Load pin is a proven design element that has been used for more than 50 years in metrology. In older books it is also known as Vibrometer.Today's designations are:
A force load pin must be attac...
Loadpin - Wikipedia
Repeatability
Repeatability or test–retest reliability is the variation in measurements taken by a single person or instrument on the same item and under the same conditions. A less-than-perfect test–retest reliabi...
Measurement
Measurement (from Old French, mesurement) is the assignment of numbers to objects or events. It is a cornerstone of most natural sciences, technology, economics, and quantitative research in other soc...
Measurement - Wikipedia
Coordinate-measuring machine
A coordinate measuring machine (CMM) is a device for measuring the physical geometrical characteristics of an object. This machine may be manually controlled by an operator or it may be computer contr...
Coordinate-measuring machine - Wikipedia
Metrication
Metrication or metrification is the conversion to the metric system of weights and measures. This has involved a long process of independent and systematic conversions of countries from various local ...
Metrication - Wikipedia
Unified Code for Units of Measure
The Unified Code for Units of Measure (the UCUM) is a system of codes for unambiguously representing measurement units to both humans and machines. The code set includes all units defined in ISO 1000...
Mass-to-charge ratio
The mass-to-charge ratio (m/Q) is a physical quantity that is most widely used in the electrodynamics of charged particles, e.g. in electron optics and ion optics. It appears in the scientific fields...
Norwegian Metrology Service
Norwegian Metrology Service (Norwegian: Justervesenet) is a Norwegian government agency responsible for metrology. Its main responsibility is to ensure that all measuring equipment in Norway is tr...
Norwegian Metrology Service - Wikipedia
Joint Committee for Guides in Metrology
The Joint Committee for Guides in Metrology (JCGM), is an organization that prepared the "Guide to the expression of uncertainty in measurement" (GUM) and the "International vocabulary of metrology – ...
Pseudoscientific metrology
Some approaches in the branch of historic metrology are highly speculative and can be qualified as pseudoscience.
In 1637 John Greaves, professor of geometry at Gresham College, made his first of ...
Pseudoscientific metrology - Wikipedia
Metre
The metre or meter (American spelling), (SI unit symbol: m), is the fundamental unit of length (SI dimension symbol: L) in the International System of Units (SI), which is maintained by the BIPM. Orig...
Metre - Wikipedia
Interferometry
Interferometry is a family of techniques in which waves, usually electromagnetic, are superimposed in order to extract information about the waves. Interferometry is an important investigative techniq...
Interferometry - Wikipedia
Mononuclidic element
A mononuclidic element is one of the 22 chemical elements that is found naturally on Earth essentially as a single nuclide (which may, or may not, be a stable nuclide). This single nuclide will have a...
Mononuclidic element - Wikipedia
WELMEC
WELMEC is a body set up to promote European cooperation in the field of legal metrology. WELMEC members are drawn from the national authorities responsible for legal metrology in European Union (EU) a...
Magritek
Magritek is a scientific instrument company based in Wellington, New Zealand, and Aachen, Germany, that was established in 2004 and specialises in compact, portable and benchtop nuclear magnetic reson...