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U-tube manometer
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Two types of pressure gauge(Left) A U-tube manometer, in which differential pressure is measured as the difference h between the high-pressure reading and the low-pressure reading, multiplied by the density of the liquid in the tube. (Right) A Bourdon-tube gauge, in which a coiled tube, flattened into the cross section shown and attached to a fixed block, is open to a pressurized fluid. The tube straightens slightly under pressure to a degree measured by a pointer.
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Two types of pressure gauge(Left)...
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