Briefly explain the principle, construction and
working of a manometer.
Answers
Pressure Measurement – Manometers Working Principle – Vaious types of Manometers. Manometers are one of the oldest type of pressure measurement. Manometers can be used to measure gauge pressure,differential pressure and absolute pressure. U tube is made of glass.The tube is filled with a fluid known as Manometer fluid
Manometers
Manometers are one of the oldest type of pressure measurement.
Manometers can be used to measure gauge pressure,differential pressure and absolute pressure.
Various types of Manometers
1.U tube Manometer
2.Well type or reservoir manometer
3.Inclined manometer
4.Float type manometer
various types of manometers
U tube Manometer.
U tube is made of glass.The tube is filled with a fluid known as Manometer fluid.
Manometer fluid may be mercury , water etc…
If the manometer is connected to same pressure source (P1 = P2) the level of the manometer will be same.
U tube manometer
If the manometer is connected to two different pressure source there will be a difference in level of the manometer fluid in both the limps.
U tube manometer working principle
If P1>P2 the differential pressure P2-P1=@h
@=density of the fluid
h=height difference
While choosing the manometer fluid for a particular application we need to remember following things.
Manometer fluid should not wet the wall
Manometer fluid should not absorb gas
Manometer fluid should not react chemically
Manometer fluid should have low vapor pressure
Move freely
A manometer works on the principle of hydrostatic equilibrium and is used for measuring the pressure (static pressure) exerted by a still liquid or gas. Hydrostatic equilibrium states that the pressure at any point in a fluid at rest is equal, and its value is just the weight of the overlying fluid.