aneroid barometer

measurement instrument

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Last updated

June 23, 2026

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An aneroid barometer is a type of barometer that measures atmospheric pressure without using any liquid. Instead, it utilizes a flexible, sealed metal capsule from which air has been removed. Changes in atmospheric pressure cause this capsule to expand or contract. This movement is then mechanically linked to a needle that indicates the pressure on a calibrated dial. Aneroid barometers are widely used in portable instruments, such as altimeters, due to their compact size and convenience. They are often calibrated against mercury barometers.12

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atmospheric pressure
…is also measured using an aneroid barometer, in which the sensing element is one or more hollow, partially evacuated, corrugated metal disks supported against collapse by an inside or outside spring; the change in the shape of the disk with changing pressure can be recorded using a pen arm and…
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…is also measured using an aneroid barometer, in which the sensing element is one or more hollow, partially evacuated, corrugated metal disks supported against collapse by an inside or outside spring; the change in the shape of the disk with changing pressure can be recorded using a pen arm and…
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surveying
Height determination
…pressure differences with a sensitive aneroid barometer, which can respond to pressure differences small enough to correspond to a foot or two (0.3 to 0.6 meter) in height. The air pressure changes constantly, however, and to obtain reliable results it is necessary to use at least two barometers; one at…
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…pressure differences with a sensitive aneroid barometer, which can respond to pressure differences small enough to correspond to a foot or two (0.3 to 0.6 meter) in height. The air pressure changes constantly, however, and to obtain reliable results it is necessary to use at least two barometers; one at…
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