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Units of Measurement and Instrumentation

  • A Dictionary of Units by Frank Tapson - University of Exeter UK
    This provides a summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the S I. The units may be found either by looking under the category in which they are used [such as length, mass, density, energy etc.], or else by picking one unit from an alphabetically ordered list of units. There are NO units of currency. There is an outline of the S I; a list of its basic defining standards and also some of its derived units; then another list of all the S I prefixes and some notes on conventions of usage.There is a short historical note on measures generally; descriptions of the Metric system, the U K (Imperial) system with a statement on the implementation of 'metrication' in the U K, and the U S system.Finally there is a list of other sources concerned with the topic of measures and units (including other Web sites) and also some notes about this document. It also gives access to 28 online calculators for changing units.

  • Important features and concepts on the following areas of measurement
    by NPL the National Physical Laroratory (UK)
    • Atomic Time
    • Colour
    • Length
    • Mass
    • Temperature
    • Light

  • Units of Measurement
    by NPL the National Physical Laroratory (UK)
    • Time
    • Length
    • Mass
    • Electric current
    • Thermodynamic temperature
    • Amount of substance
    • Luminous intensity
    • Examples of SI Derived units
    • Internationally recognised non SI units
    • Background information
    • SI prefixes
    • SI conventions

See Also our Physics, General Science, and Mathematics Section

    
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