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Barometer
is used to measure atmospheric pressure
Manometer
or medical manometer is used to measure blood pressure
Water manometer
is used to measure lungs pressure
Tonometer
is used to measure eye pressure
Urine meter
is used it to measure specific density urine
Hydrometer
is used to measure specific density of liquids
Average blood pressure at aorta equals
100 mm Hg.=13.33kpa
Systolic level of blood pressure equals
120 mm Hg.= 15.99kpa
Diastolic level of blood pressure equals
80 mm Hg.=10.66kpa
Pascal principle
Pressure applied to an enclosed fluid is transmitted without loss to every part of the fluid
The idea of using a Hydrometer is based on
Archimedes’ Principle.
This difference in pressure depends on
depends on the surface tension of the liquid and the radius of the bubble or the liquid drop.