aneroid barometer

Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms.

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.
..... Click the link for more information. .

aneroid barometer

[′an·ə‚rȯid bə′räm·əd·ər]

(engineering)

A barometer which utilizes an aneroid capsule. Also known as aneroid.

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.

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

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.

ANTIQUES: Whatever the weather

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.