A water column manometer measures pressure, such as the pressure output from a cpap unit used for sleep apnea.
The manometer becomes much more sensitive ( 13.59 times more sensitive than a mercury manometer)
Any clean water can be used in a manometer.
The reason the water levels in the various manometer tubes are different is because of the difference in pressure. A manometer is used to measure the pressure between two different systems.
cause of the about of nice bits floating around Mercury is better because 1) it doesn't evaporate 2) water has a density 13.6 times lower than mercury, so for some applications the size of the manometer would have to be very large.
mean and dirty a one foot column of water will produce 1/2 psig head
The depth in the ocean is measured by sounding using echo-sounders. Nowadays satellites are also used for this purpose.
Measuring to see if something is level.
volume
Chlorotex is used to test chlorine in water.
Using a water pressure gauge and is measured in kilo pascals (kpa)
Mercury is used due to its higher specific gravity allowing the manometer physical size to be smaller in direct proportion to the weight of mercury vs weight of water.and its vapour pressure is negligible.these are the two reasons .
A manometer is a device for measuring pressures, especially the word is used for pressure meters that are constructed to use a liquid in a transparent U-tube. A peizometer is specifically about measuring pressures in ground water wells.