Manometers – Classification and Applications

Manometers are used to measure the fluid pressure. Manometers are made up of a single column or a two-column made with glass. The working principle of manometers is that one of its ends is open to the fluid of whose pressure is to be measured, and the other end is connected with leak leak-proof liquid.
There are different types of Manometers with their specific applications.

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 in pressure. They are used to detect these changes only. Inclined tube manometers are useful where greater accuracy is needed, such as in low-pressure gas pipelines. This can also measure vacuum pressure.

Enlarged Lag Manometers

These types of manometers use a float in their 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: These are ideal for measuring gauge pressure.
2. Inverted differential manometer: These are especially useful for detecting small pressure differences such as those found in HVAC systems.

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 operation, and no special skills are required.
4. Their accuracy is pretty good, so we can heavily rely on it.
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 a very small working range.
5. They do not have any fixed reference.

Applications of Manometers

1. Manometers can detect leakage in pipes.
2. Manometers can also measure vacuum pressure.
3. These can measure the level of liquid in the tank.
4. Manometers are used to calibrate the measuring instruments.

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Download Also-

National Building Code of India 2016 – Volume 1 & Volume 2 [PDF]

Download International Codes-

International Building Code 2021 Version

International Building Code 2018 Version

External Resources-

Detailed Guide on Inclined Tube Manometers

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