What are the difference between the mercury barometer and aneroid barometer?

Answer 1

An aneroid barometer, invented by the French 19th century engineer and inventor Lucien Vidie, uses a small, flexible metal box called an aneroid cell. This aneroid capsule (cell) is made from an alloy of beryllium and copper. The evacuated capsule (or usually more capsules) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer.

A mercury barometer has a glass tube of at least 84 cm in height, closed at one end, with an open Mercury-filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir. Since higher temperature at the instrument will reduce the density of the mercury, the scale for reading the height of the mercury is adjusted to compensate for this effect.

Answer 2

A mercury barometer works by, measuring the height of a column of mercury in a sealed tube, supported by the atmospheric pressure.

An aneroid barometer measures the amount of distortion of a sealed metal can, due to changes in atmospheric pressure. The equivalent column of mercury supported by a mercury barometer, can then be calibrated in mmHg by comparison.

Both instruments do the same job and can be calibrated in Millibars or mmHg, or both.

Answer 3

A Mercury Barometer and an Aneroid Barometer are alike because they both messure air pressure. They are different because and aneroid barometer does NOT use mercury, and of course a Mercury Barometer does use mercury.

Answer 4

A mercury barometer has a glass tube with a height of at least 84 cm, closed at one end, with an open mercury-filled reservoir at the base.

while

An aneroid barometer,invented by the French 19th century engineer and inventor Lucien Vidie, uses a small, flexible metal box called an aneroid cell. This aneroid capsule (cell) is made from an alloy of beryllium and copper.[9] The evacuated capsule (or usually more capsules) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer. Many models include a manually set needle which is used to mark the current measurement so a change can be seen. In addition, the mechanism is made deliberately "stiff" so that tapping the barometer reveals whether the pressure is rising or falling as the pointer moves.

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Answer 5

A mercury barometer works by, measuring the height of a column of mercury in a sealed tube, supported by the atmospheric pressure.

An aneroid barometer measures the amount of distortion of a sealed metal can, due to changes in atmospheric pressure. The equivalent column of mercury supported by a mercury barometer, can then be calibrated in mmHg by comparison.

Both instruments do the same job and can be calibrated in Millibars or mmHg, or both.

Answer 6

they both measure the change in air pressure

Answer 7

The main similarity between a mercury barometer and an aneroid barometer is that both of them measure air pressure. The former uses liquid mercury while the latter does not use the same.

Answer 8

An aneroid barometer is an instrument that measures air pressure without using liquid. A mercury barometer is an instrument used to measure air pressure using liquid mercury.

Answer 9

Aneroid barometers have airtight metal chambers and a vacuum and a Mercury on is a glass tube

Answer 10

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