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air gauge

measurement instrument

Quick Summary

An air gauge is a measurement instrument used to determine air pressure. There are different types of air gauges. One type is a comparator that measures the rate of air escape between a surface being tested and a known curved surface to determine differences in curvature. Another type, often referred to as an air gauge, is used to gauge holes. While mercury barometers, which measure atmospheric pressure, were invented in the 17th century, air gauges are more broadly defined as instruments for measuring air pressure.123

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