A vernier caliper is a precision measuring tool used to measure linear dimensions and the diameter of round objects. It has two scales, the main scale and the vernier scale, which work together to make precise measurements:
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Main scaleSimilar to a ruler, the main scale is one of the two scales on a vernier caliper.
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Vernier scaleA sliding scale that’s slightly smaller than the main scale and has divisions that are a fraction of the main scale’s smallest division.
Here are some things to know about vernier calipers:
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How to read a vernier caliperThe zeros of the main and vernier scales should line up when the jaws are closed. If they don’t, there’s a zero error.
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UsesVernier calipers are used in scientific laboratories and manufacturing for quality control.
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LimitationsA mathematical mistake called zero error can occur when the vernier scale’s zero doesn’t match the main scale’s zero.
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