๐Pressure = Force/Area
๐SI unit is Pascal
๐1Pa = 1N/m-2
๐It is the simplest method of pressure measurement
๐lt does not need calibration
๐So it can be used to calibrate other devices
๐The pressure is balanced against a column of liquid of known density - usually water for low pressures and mercury for higher pressures
๐The pressure is equal to the depth multiplied by the liquid density multiplied by the acceleration due to gravity; hence the commonly used units cm of H2O and mm of Hg
๐Mercury is 13 times more dense than water
๐The vertical height gives the pressure value
๐SI unit is Pascal
๐1Pa = 1N/m-2
๐It is the simplest method of pressure measurement
๐lt does not need calibration
๐So it can be used to calibrate other devices
๐The pressure is balanced against a column of liquid of known density - usually water for low pressures and mercury for higher pressures
๐The pressure is equal to the depth multiplied by the liquid density multiplied by the acceleration due to gravity; hence the commonly used units cm of H2O and mm of Hg
๐Mercury is 13 times more dense than water
๐The vertical height gives the pressure value
