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| Mining barometer 28/12/2010 | Barometer Shop In the past, barometers were used in mines to help detect changes in atmospheric [ ... ] |
Aneroid barometer 26/05/2011 | Barometer Shop The most common type barometer used in homes is the aneroid barometer. Aneroid b [ ... ] | Other Articles | ||

Aneroid barometers
Aneroid barometers. An aneroid barometer uses a small, flexible metal box known as an aneroid cell. This cell is made from an beryllium and copper and a spring stops it from collapsing. Small changes in external air pressure expand or shrink the cell. This expansion or contraction controls mechanical levers so that small movements of the cell are magnified and shown on the face of the aneroid barometer. The mechanism may be made deliberately 'stiff' so that tapping the barometer reveals whether the pressure is rising or falling as the pointer moves.
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Aneroid barometers



