Aneroid barometer



a device for measuring atmospheric pressure, often specially calibrated for use as an altimeter, consisting of a box or chamber partially exhausted of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air.
Historical Examples

This is the mercurial barometer; another, the aneroid barometer, invented by Monsr.
The Sailor’s Word-Book William Henry Smyth

The atmospheric pressure by the aneroid barometer was at 29.83.
My Attainment of the Pole Frederick A. Cook

Pity that I had no aneroid barometer for ascertaining the elevation of that site.
Byeways in Palestine James Finn

Potain modified the apparatus by using air in the bulb with an aneroid barometer for recording the pressure.
Arteriosclerosis and Hypertension: Louis Marshall Warfield

It was three miles to the bottom of the gully, and the aneroid barometer registered one thousand one hundred and ninety feet.
The Home of the Blizzard Douglas Mawson

The altimeter, which is an aneroid barometer, outlines with fair accuracy the height above the ground at which a plane is flying.
Aviation Engines Victor Wilfred Pag

I had still strength to tap the aneroid barometer to facilitate the movement of the needle.
The Dominion of the Air J. M. Bacon

The pressure at the surface of Mars will therefore be 2·1 lb.; and the aneroid barometer would read 4·3 inches.
Are the Planets Inhabited? E. Walter Maunder

Got a little doodad out of his pocket; aneroid barometer, or something, he said it was.
The Brain Alexander Blade

In most countries it must be done by reading feet on an aneroid barometer, set with zero of level scale to 30 ins.
How to Observe in Archaeology Various

noun
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
aneroid barometer
(ān’ə-roid’)

A barometer consisting of a thin elastic disk covering a chamber that contains a partial vacuum. High atmospheric pressure pushes against the disk and causes it to bulge inward, while low pressure does not push as hard, allowing the disk to bulge outward. An aneroid barometer is smaller and more portable than a mercury barometer and, when used with a barograph, can record up to a week’s worth of data. Aneroid barometers are used extensively in aviation as part of altimeters.

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