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Micrometers

Micrometers are devices for measuring linear dimensions:

The conventional micrometer has a thimble that rotates on a barrel. The thimble drives a screw that opens or closes the micrometer:

One full turn of the thimble changes the measured dimension by 0.025". There is a scale along the barrel divided into intervals of 0.025", thus a complete turn of the barrel will cause a one increment movement. There are also 25 equi-spaced reference marks on the thimble, moving one increment of these marks changes the measurement by 0.001"

For other devices see Measurement Methods.

 Measurement Systems for both attributes and variables are covered in the MiC Quality course on Measurement Systems Analysis Try out our courses by taking the first module of the Primer in Statistics free of charge.
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