| Aneroid barometer |
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| Sunday, 20 December 2009 10:50 |
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The most common type barometer used in homes is the aneroid barometer. Aneroid barometers contain a flexible metal capsule known as an aneroid cell. The cell is made from Beryllium and Copper, and is designed so that small variations in external air pressure make the capsule to expand or shrink. The size of the aneroid cell is calibrated so that the springs and levers attached read off the correct pressure readings.
An aneroid barometer
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