Question

What is manometer. Explain its working

Answer 1

Heyya!


@ A manometer is a meter that can compare and measure pressures of gas and can also be used for testing water vapour pressure. It is a measuring instrument.

@ Working of manometer

=> A liquid is placed in the tube, usually a responsive liquid like mercury that is stable under pressure. One end of the U-tube is then filled with the gas to be measured, usually pumped in so the tube can be sealed behind it. The other end is left open for a natural pressure level. The liquid is then balanced in the lower section of the U, depending on the strength of the gas. The atmospheric pressure pushes down on the liquid, forcing it down and into the closed end of the tube. The gas trapped in the sealed end also pushes down, forcing the liquid back to the other side.

Then a measurement is taken to see how far the liquid in the sealed end has been pushed either below the point of the liquid in the open end or above it. If the liquid is level, straight across in both tubes, then the gas is equal to outside air pressure. If the liquid rises above this level in the sealed end, then the air's pressure is heavier than the gas. If the gas is heavier than the air, it will push the liquid in the sealed end below the equal point.


Hope it helps!☺️

Answer 2

Manometer is a device in which columns of a suitable liquid are used to measure the difference in pressure between two points or between a certain point and the atmosphere. Manometer is needed for measuring large gauge pressures.