Manometers – Classification and Applications

Manometers are used to measure the fluid pressure. Manometers are made up of single column or two column made with glass. The working principle of manometers is that one end of it is open to the fluid of which the pressure is to be measured and the other end is connected with leak proof liquid.
There are different types of Manometers-

1. Single column Manometer
2. Inclined tube Manometer
3. Enlarged lag Manometer
4. Differential Manometer

Single Column Manometers

This type of manometers are widely used to measure the pressure of liquid in pipes of conduits. The limitation of single column manometer is that it can’t be used to measure the pressure of gaseous fluids.

Inclined tube Manometers

These manometers are very sensitive to even small changes of pressure. They are used to detect this changes only.

Enlarged lag Manometers

These type of manometers uses float in its enlarged lag to indicate the pressure built in the fluid.

Differential Manometer

These measures the difference in pressure at two different locations in the pipe.

1. U-Tube differential manometer
2. Inverted differential manometer

Advantages of Manometers

1. Manometers are easy to construct and low cost devices.
2. They can be used on numbers of types of fluids.
3. They are simple in operations.
4. Their accuracy is pretty good.
5. Manometers can be used to measure low pressure also.
6. They have good sensitivity.

Disadvantages of Manometers

1. They often have an error in the form of condensation.
2. Manometers should be handle with care as they are fragile.
3. They may show error because of temperature change.
4. They have very small working range.
5. They do not have any fix reference.

Applications of Manometers

1. Manometers are used to check leak proof of pipes.
2. Manometers can also measure vacuum pressure.
3. These can measure the level of liquid in the tank.
4. They can meter calibration.

Read Also- Types Of Fluid Flow – Fluid Mechanics