Difference Between Barometers and Manometers

A scientific device used to calculate atmospheric pressure is called a barometer. The minor fluctuations in pressure that are caused by weather and its different elements are measured by barometers.

A scientific device used for measurement and indication of pressure is called a manometer. It is not only used to measure air pressure but also used for the measurement of other pressures that are lower than the air pressure.

Comparison Table Between Barometers and Manometers

Parameters of Comparison Barometers Manometers
Invented in/on16431661
InventorsEvangelista TorricelliOtto von Guericke
SubtypesWater barometers, Mercury barometers, Fitzroy barometers, Fortin barometers, Sympiesometers, Wheel barometers, Vacuum Pump Oil barometers, Aneroid barometers, MEMS barometers.U-tube manometers, Differential U-tube manometers, Inverted U-tube manometers, Micro manometers, Inclined manometers, Ring-Balance manometers, Digital manometers, Analog manometers.
UsesMeasurement of atmospheric pressure, Whether forecasting, Used in scuba diving to keep track of the diver's air tank, In smartphone's fitness applications, In smartphone's GPS chip for faster locks and delivery of altitude data.Measurements of smaller or larger pressure differences, Monitoring of gas pressure in water pipelines, Measurement of water pressure, Mercury Absolute manometers are used for various purposes in power plants, Used in research laboratories.
AdvantagesHigh density, low vapour pressure, Moderate rate of evaporation, Non-sticky, Opaque surface.Less maintenance, Fewer costs, Feasible manufacturing, Excellent accuracy and sensitivity.
Disadvantages Some types of barometers are easy to transport while some are not, with High chances of contamination of the liquid.Large in size and bulky, Requires levelling, Condensation introduces errors, Poor dynamic performance.

What are Barometers?

A scientific device used to calculate atmospheric pressure is called a barometer. In the year 1643, Evangelista Torricelli invented the first barometer.

The Measurement of atmospheric pressure by a barometer is referred to as barometric pressure. The equation by which we can find the barometric pressure is "Patm= ρgh".

Several other applications of a barometer and its subtypes include, Measurement of atmospheric pressure, Whether forecasting, Used in scuba diving to keep track of the diver's air tank.

There are several types of barometers classified on parameters, like the material used to make them and their methods for measurements-for example, Water barometers, Mercury barometers, Fitzroy barometers, Fortin barometers, Sympiesometers, Wheel barometers.

Barometers gave their disadvantages and advantages. Some of its advantages include high density, low vapour pressure, moderate rate of evaporation, non-sticky, opaque surface, and some of its disadvantages include high chances of contamination of the liquid.

What are Manometers?

A scientific device used for measurement and indication of pressure is called a manometer. It is not only used to measure air pressure but also used for the measurement of other pressures that are lower than the air pressure.

Light oils, water and mercury, are some of the liquids used in a manometer for measurement. A manometer is also used to measure smaller or larger pressure differences.

It has several other subtypes which include, U-tube manometers, Differential U-tube manometers, Inverted U-tube manometers, Micro manometers, Inclined manometers, Ring-Balance manometers, Digital manometers, Analog manometers. These several types have several applications and have their independent properties and constructions.

Several applications of manometers include Measurements of smaller or larger pressure differences, Monitoring of gas pressure in water pipelines, Measurement of water pressure.

Some of its advantages include less maintenance, fewer costs, feasible manufacturing, excellent accuracy and sensitivity, and some of its disadvantages include large in size and bulky, requires levelling, condensation introduces errors, poor dynamic performance.

Main Differences Between Barometers and Manometers

  1. The design and functionality in barometers are rather limited than the design and functions in manometers.
  2. Manometers have both open outlets. On the other hands, barometers have one closed outlet, which has a vacuum.
Difference Between Barometers and Manometers

Conclusion

Both the devices have several applications. These applications have proven to be helpful in various fields and have been significant to mankind.

They do have some disadvantages, but their evolution ever since their establishment is remarkable, and the disadvantages will be overcome in future generations.

Their methods and accurate results are helpful in science and technology. Mankind has made abundant use of these devices ever since they were invented.

References

  1. https://books.google.com/books?hl=en&lr=&id=gohJZ5GlCOwC&oi=fnd&pg=PA1&dq=manometers&ots=92r3wYfsXx&sig=x1yUot31rTZ9efE-8u1hHQ_Fshs
  2. https://academic.oup.com/gji/article-abstract/48/3/281/615208
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