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  2. Vernier scale - Wikipedia

    en.wikipedia.org/wiki/Vernier_scale

    Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales.

  3. Micrometre - Wikipedia

    en.wikipedia.org/wiki/Micrometre

    The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, [2] is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a ...

  4. Calipers - Wikipedia

    en.wikipedia.org/wiki/Calipers

    Ordinary 150 mm (6 in) digital calipers made of stainless steel have a rated accuracy of 0.02 mm and a resolution of 0.01 mm (0.0005 in). [11] The same technology is used for longer calipers, but accuracy declines to 0.03 mm (0.001 in) for 100–200 mm (4–8 in) and 0.04 mm (0.0015 in) for 200–300 mm (8–12 in) measurements.

  5. Radar speed gun - Wikipedia

    en.wikipedia.org/wiki/Radar_speed_gun

    A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting traffic enforcement , and in professional sports to measure speeds such as those of baseball pitches , [ 1 ] tennis serves , and ...

  6. Syringe filter - Wikipedia

    en.wikipedia.org/wiki/Syringe_filter

    The smallest known sterile syringe microfilter have pore sizes of 0.02 μm. Membrane diameters of 10 mm, 13 mm, 25 mm are common as well. Some syringe filters for small volumes may not resemble a wheel at all. The syringe filter body may be made of such materials as polypropylene and nylon.

  7. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  8. Shot (pellet) - Wikipedia

    en.wikipedia.org/wiki/Shot_(pellet)

    The size of the lead shot that is produced is determined by the diameter of the orifice used to drip the lead, ranging from approximately 0.018 inches (0.46 mm) for #9 lead shot to about 0.025 inches (0.64 mm) for #6 or #7.0 shot, while also depending on the specific lead alloy that is used.

  9. Electron backscatter diffraction - Wikipedia

    en.wikipedia.org/wiki/Electron_backscatter...

    An electron backscatter diffraction pattern of monocrystalline silicon, taken at 20 kV with a field-emission electron source. Electron backscatter diffraction (EBSD) is a scanning electron microscopy (SEM) technique used to study the crystallographic structure of materials.