Barometer

A barometer is an instrument used to measure atmospheric pressure.

Aneroid barometers

Another type of barometer, the aneroid barometer, uses a small, flexible metal box called an aneroid cell. The box is tightly sealed after some of the air is removed, so that small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives a series of mechanical levers and other devices which are displayed on the face of the aneroid barometer.

Related Topics:
Aneroid - Metal

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