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2. Micrometer (device) - Wikipedia

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

   Blade micrometers have a matching set of narrow tips (blades). They allow, for example, the measuring of a narrow o-ring groove. Pitch-diameter micrometers (aka thread mics) have a matching set of thread-shaped tips for measuring the pitch diameter of screw threads. Limit mics have two anvils and two spindles, and are used like a snap gauge ...

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. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   Size of a pixel on a 17-inch monitor with a resolution of 1024×768 560 μm Thickness of the central area of a human cornea [26] 750 μm Maximum diameter of Thiomargarita namibiensis, the second largest bacterium ever discovered 10 −3: 1 millimeter ~5 mm Length of an average flea is 1–10 mm (usually <5 mm) [27] 2.54 mm

5. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Lux meter for measuring illuminance, i.e. incident luminous flux per unit area; Luminance meter for measuring luminance, i.e. luminous flux per unit area and unit solid angle; Light meter, an instrument used to set photographic exposures. It can be either a lux meter (incident-light meter) or a luminance meter (reflected-light meter), and is ...

6. Bore gauge - Wikipedia

   en.wikipedia.org/wiki/Bore_gauge

   That is the diameter of the component. Repeat the procedure in 3 different places and get the average value of the diameter of the component. This is the most common way to measure the larger bore. It is available in different ranges; normally you can use this from 300 mm to 4000 mm for external diameter.

7. Calipers - Wikipedia

   en.wikipedia.org/wiki/Calipers

   Inside small jaws: used to measure the internal diameter of an object (like a hollow cylinder or pipe). Depth probe, or depth rod: used to measure depths of an object (like a small beaker) or a hole. Main scale (metric): marked every millimeter and helps to measure length correct up to 1 mm. Main scale (imperial): marked in inches and fractions.