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2. Mill test report (metals industry) - Wikipedia

   en.wikipedia.org/wiki/Mill_test_report_(metals...

   A mill test report (MTR) and often also called a certified mill test report, certified material test report, mill test certificate (MTC), inspection certificate, certificate of test, or a host of other names, is a quality assurance document used in the metals industry that certifies a material's chemical and physical properties and states a product made of metal (steel, aluminum, brass or ...

3. Certified reference materials - Wikipedia

   en.wikipedia.org/wiki/Certified_reference_materials

   A certified reference material is a particular form of measurement standard. Reference materials are particularly important for analytical chemistry and clinical analysis. [2] Since most analytical instrumentation is comparative, it requires a sample of known composition (reference material) for accurate calibration.

4. 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]

5. Combination square - Wikipedia

   en.wikipedia.org/wiki/Combination_square

   The heads are manufactured from either forged steel, cast iron, die-cast aluminium, die-cast zinc, or plastic. Aluminium and zinc heads are cheaper than steel and iron, but less durable and more prone to inaccuracy. [5] Cast iron and steel heads are also notably heavier. The heads are usually painted except for the flat machined reference faces.

6. Measuring rod - Wikipedia

   en.wikipedia.org/wiki/Measuring_rod

   Excavations at Lothal dating to 2400 BCE have yielded one such ruler calibrated to about 1 ⁄ 16 inch (1.6 mm) [3] Ian Whitelaw (2007) holds that 'The Mohenjo-Daro ruler is divided into units corresponding to 1.32 inches (34 mm) and these are marked out in decimal subdivisions with remarkable accuracy—to within 0.005 inches (0.13 mm).

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8. Graduation (scale) - Wikipedia

   en.wikipedia.org/wiki/Graduation_(scale)

   A ruler with two linear scales: the metric and imperial.It includes shorter minor graduations and longer major graduations. A graduation is a marking used to indicate points on a visual scale, which can be present on a container, a measuring device, or the axes of a line plot, usually one of many along a line or curve, each in the form of short line segments perpendicular to the line or curve.

9. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Calorimeters are called active or heated if they heat the sample, or reformulated: if they are gauged to fill the sample with a defined amount of entropy. Actinometer heating power of radiation. Constant-temperature calorimeter , phase change calorimeter for example an ice calorimeter or any other calorimeter observing a phase change or using a ...