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A micrometer is a measurement device incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades. The first micrometer was developed by Jean Laurent Palmer of Paris in 1848.
There are 3.9370078740157E-5 inches in a micrometer. 1 Micrometer is equal to 3.9370078740157E-5 Inches. 1 um = 3.9370078740157E-5 in. A micrometer, or micron, is a unit of length sometimes used in SI as a 1Ã10â6 of a meter. This is a quite specific measurement unit used in science (i.e. for measuring various types of wavelength, etc.) or in industrial technology.