aneroid barometer


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Related to aneroid barometer: mercury barometer

aneroid barometer:

see barometerbarometer
, instrument for measuring atmospheric pressure. It was invented in 1643 by the Italian scientist Evangelista Torricelli, who used a column of water in a tube 34 ft (10.4 m) long.
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aneroid barometer

[′an·ə‚rȯid bə′räm·əd·ər]
(engineering)
A barometer which utilizes an aneroid capsule. Also known as aneroid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

aneroid barometer

aneroid barometer
An instrument that measures the atmospheric pressure. It consists of a cylindrical vacuum chamber with corrugated tops and sides. A system of springs within the chamber prevents the chamber from collapsing as a result of outside air pressure. A pointer through a suitable gearing indicates the expansion and contraction of the aneroid, according to the atmospheric pressure. Also known as a siphon chamber.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

aneroid barometer

a device for measuring atmospheric pressure without the use of fluids. It consists of a partially evacuated metal chamber, the thin corrugated lid of which is displaced by variations in the external air pressure. This displacement is magnified by levers and made to operate a pointer
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Aneroid barometers could be set in simple round cases rather like clocks, and were also enclosed in traditional banjo cases, with a thermometer included above the dial.
He was known to have performed an experiment comparing the performance of the new aneroid barometer supplied by Negretti and Zambra against that of the mercury barometer.