Barometer that measures atmospheric pressure via the expansion and contraction of a sealed hollow cell which is partially depleted of air.

An instrument for measuring atmospheric pressure in which a needle, attached to the top of an evacuated box, is deflected as changes in atmospheric pressure cause the top of the box to bend in or out.

An instrument designed to measure atmospheric pressure. It contains no liquid.

tool that determines atmospheric pressure by measuring how much a metal chamber expands or contracts.

A barometer which operates on the principle of having changing atmospheric pressure bend a metallic surface which, in turn, moves a pointer across a scale graduated in units of pressure. 

An instrument for measuring atmospheric pressure and determining altitude.

A barometer whose pressure sensor consists of an aneroid capsule

An instrument for measuring atmospheric pressure that does not use a liquid. It is built around a metal structure that bends with changing air pressure.

A mechanical barometer used to measure air pressure for warnings of changing weather.

A mechanical barometer used to measure air pressure for warnings of changing weather

an instrument that determines atmospheric pressure by the effect of such pressure on a thin-metal cylinder from which the air has been partly exhausted

A mechanical barometer used to measure air pressure for warnings of changing weather.

An instrument designed to measure atmospheric pressure. It contains no mercury (Hg).

a barometer

The inclination to each other of two intersecting lines, measured by the arc of a circle intercepted between the two lines forming the angle, the center of the circle being the point of intersection. [..]

A barometer which operates on the principle of having changing atmospheric pressure bend a metallic surface which, in turn, moves a pointer across a scale graduated in units of pressure.

An instrument for measuring atmospheric pressure in which a needle, attached to the top of an evacuated box, is deflected as changes in atmospheric pressure cause the top of the box to bend in or out.

A portable instrument that utilizes a flexible metal chamber and spring to measure air pressure; may be used as an altimeter.

An instrument built around a metal structure that bends with changing air pressure

An instrument for measuring the atmospheric pressure. It registers the change in the shape of an evacuated metal cell to measure variations on the atmospheric pressure. The aneroid is a thin-walled metal capsule or cell, usually made of phosphor bronze or beryllium copper. The scales on the glass cover measure pressure in both inches and millibars.

An instrument for measuring the atmospheric pressure. It registers the change in the shape of an evacuated metal cell to measure variations on the atmospheric pressure. The aneroid is a thin-walled metal capsule or cell, usually made of phosphor bronze or beryllium copper. The scales on the glass cover measure pressure in both inches and millibars. [..]

An instrument for measuring the atmospheric pressure. It registers the change in the shape of an evacuated metal cell to measure variations on the atmospheric pressure. The aneroid is a thin-walled me [..]

A barometer which measures atmospheric pressure using one or a series of aneroid capsules. Also called holosteric barometer.

An instrument for measuring the atmospheric pressure

An instrument for measuring atmospheric pressure in which a needle, attached to the top of an evacuated box, is deflected as changes in atmospheric pressure cause the top of the box to bend in or out.

A device to measure air pressure that uses an aneroid, which is a sealed, flexible metal bellows with some air removed that expands and contracts with air pressure changes.

An instrument for measuring the atmospheric pressure. It registers the change in the shape of an evacuated metal cell to measure variations on the atmospheric pressure. The aneroid is a thin-walled metal capsule or cell, usually made of phosphor bronze or beryllium copper. The scales on the glass cover measure pressure in both inches and millibars. [..]

A barometer in which variations in pressure are measured using a partially evacuated capsule whose sides move in and out.