Aneroid barometer

Aneroid Barometer

The aneroid barometer is a type of barometer that uses a small, flexible metal box called an aneroid cell to measure atmospheric pressure. This device was invented in 1844 by French scientist Lucien Vidi.

History

The aneroid barometer was developed as an alternative to the more traditional mercury barometer. The term "aneroid" means "without liquid," reflecting the fact that this device does not rely on a liquid such as mercury to function.

Design and Function

The core component of an aneroid barometer is the aneroid cell, a small, sealed box made from an alloy of beryllium and copper. This box is designed to expand and contract with changes in atmospheric pressure. As the pressure increases, the box contracts, and as the pressure decreases, the box expands. This movement is then translated into a measurement of atmospheric pressure through a system of mechanical levers and springs, which move a pointer across a scale.

Applications

Aneroid barometers are used in a variety of applications. They are commonly found in homes and offices as decorative items that also provide a basic weather forecast. In addition, they are used in aviation, where they form a critical part of an aircraft's altimeter, and in meteorology, for the measurement of atmospheric pressure.

See Also

• Barometer
• Altimeter
• Meteorology

References

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