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  1. Time. Watch, a time measurement device. In the past, a common time measuring instrument was the sundial. Today, the usual measuring instruments for time are clocks and watches. For highly accurate measurement of time an atomic clock is used. Stopwatches are also used to measure time in some sports.

  2. Instrumentation. Instrumentation is a collective term for measuring instruments, used for indicating, measuring, and recording physical quantities. It is also a field of study about the art and science about making measurement instruments, involving the related areas of metrology, automation, and control theory .

  3. en.wikipedia.org › wiki › CalibrationCalibration - Wikipedia

    Calibration. In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, a sound tone ...

  4. A ruler is known to be a long measuring instrument that is most commonly used in order to measure the length of an object. Generally, the rulers are found being made of either iron, mica or wood. This measuring instrument is the one which is commonly used by the people and is even considered as a necessity for the children going to school.

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