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How Do You Ensure That a Tape Measure is Accurate?

The short answer

NIST
Tue, 08/02/2022 - 12:03
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Y
ou need to measure length accurately to do things like make a dress, build a house, survey a plot of land, or determine if the home team made a first down on the football field. These length measurements and many others are often made with the help of a measuring tape. The major companies that produce the tape measures we use in everyday life rely on waves of light as the ultimate ruler to ensure their tapes are accurate.

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Some manufacturers use highly accurate reference tape measures to print their familiar hash marks on the tape. Some are printed using computer-controlled ink printers with tiny print heads to ensure the markings are laid down accurately.


A hash mark on a tape measure as seen through a microscope. Credit: NIST

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