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  2. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...

  3. File:Micrometer.svg - Wikipedia

    en.wikipedia.org/wiki/File:Micrometer.svg

    English: Illustration of a micrometer caliper. The micrometer is showing a measurement of 7.145 mm ± 0.005 mm. Legend: Anvil: part that the spindle moves toward, and that the sample rests against; Spindle: moved by the thimble towards the anvil; Ratchet stop: limits applied pressure by slipping at a calibrated torque

  4. 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.

  5. Calipers - Wikipedia

    en.wikipedia.org/wiki/Calipers

    Caliper is the American spelling, while calliper (double "L") is the British spelling. A single tool might be referred to as a caliper or as calipers — a plural only (plurale tantum) form, like scissors or glasses. Colloquially, the phrase "pair of verniers" or just "vernier" might refer to a vernier caliper.

  6. Hegman gauge - Wikipedia

    en.wikipedia.org/wiki/Hegman_gauge

    The reading is taken from the scale marked next to the grooves, in dimensionless "Hegman units" (or National Standard units; NS) and/or mils or micrometres. [5] Hegman units are defined in terms of an inverted size scale as shown below: [6] Hegman Grind Gage and doctor blade Paint sample at top of Hegman Hegman after paint drawdown

  7. File:Micrometers.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Micrometers.jpg

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  8. Traveling microscope - Wikipedia

    en.wikipedia.org/wiki/Traveling_microscope

    A metallic carriage clamped to a spring-loaded bar slides with its attached vernier and reading lens along an inlaid strip of metal scale. The scale is divided in half millimeters. Fine adjustments are made by means of a micrometer screw for taking accurate reading. Both vernier reading to 0.01mm or 0.02mm.

  9. Least count - Wikipedia

    en.wikipedia.org/wiki/Least_Count

    The stopwatch is more precise at measuring time intervals than the sundial because it has more "counts" (scale intervals) in each hour of elapsed time. Least count of an instrument is one of the very important tools in order to get accurate readings of instruments like vernier caliper and screw gauge used in various experiments.