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  2. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    A Chesterman tape measure. James Chesterman, a British metalworker, is credited with the invention of the first retractable tape measure in 1821. [6] His design consisted of a spring-loaded cloth strip with marked measurements, housed within a compact case. Building upon his prior design, Chesterman would patent the first steel tape measure. [7]

  3. Diameter tape - Wikipedia

    en.wikipedia.org/wiki/Diameter_tape

    A diameter tape (D-tape) is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape has either metric or imperial measurements reduced by the value of π. This means the tape measures the diameter of the object. It is assumed that the cylinder object is a perfect circle.

  4. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    A measuring instrument for lengths: a typical tape measure with both metric and imperial units and two US pennies for comparison A measuring instrument is a device to measure a physical quantity . In the physical sciences , quality assurance , and engineering , measurement is the activity of obtaining and comparing physical quantities of real ...

  5. Lufkin (brand) - Wikipedia

    en.wikipedia.org/wiki/Lufkin_(brand)

    Lufkin is a brand featuring primarily measurement tools such as calipers, gauges, micrometers, and measuring tapes. Lufkin is a brand of Apex Tool Group . History

  6. Ruler - Wikipedia

    en.wikipedia.org/wiki/Ruler

    A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

  7. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    A kilogram mass and three metric measuring devices: a tape measure in centimetres, a thermometer in degrees Celsius, and a multimeter that measures potential in volts, current in amperes and resistance in ohms.