Mechanical Basics

What Is The Pressure Gauge?

The Pressure Gauge is a measuring instrument that helps to measure the force exerted by the fluids (liquids and gases both are called fluids) when they are in a static position and even at a dynamic position. The pressure is a type of force that we calculate when it is applied over any fluids (liquid or gases).

Pressure Gauge 1 Pressure Gauge 1

What can you learn from this post?

  • Types of Pressure
  • Types Of Pressure Gauge
  • Working Principle Of Pressure Gauge
  • Advantages Of Pressure Gauge
  • Applications Of Pressure Gauge
  • Conclusion

Types of Pressure:

We observe different types of pressures around us that need deep knowledge. So, the types of pressures are as follows:

Vacuum Pressure:

The pressure is the type of pressure that can be observed when there is no air presence. It is also called the Negative Gauge.

Atmospheric Pressure:

The normal force of the air that we can observe in the atmosphere is called Atmospheric Pressure.

Pressure Gauge, Working Principle Of Pressure Gauge - Its Types, Advantages
Gauge Pressure:

The force of the fluids while static or dynamic that we measure using the Gauge is called Gauge Pressure. In the gauge pressure, we take atmospheric pressure as Datum. It is also called Positive Pressure.

Absolute Pressure:

The force that we can observe above the absolute zero pressure is called Absolute Pressure.

We read about what is the pressure gauge and different types of pressures till now, let’s proceed further and read more about the pressure gauge.

Types Of Pressure Gauge:

There are different types of pressure gauge are available according to their internal mechanism and working. Their usage and applications depend upon the industry and situation. So, a few types of pressure gauge that we can observe around us are

  • Aneroid Type of Pressure Gauges:
  1. Bourdon Type of Pressure Gauge or Bourdon Pressure Gauge.
  2. Bellow Type of Pressure Gauge
  3. Diaphragm Type of Pressure gauge
  4. Magnetic Coupling Type of Pressure Gauge
  • Mcleod Gauge
  • Spinning – Rotor Gauge

You can read about these four types of pressure gauge in detail in the upcoming articles. Stay Tuned.

Working Principle Of Pressure Gauge:

The pressure is defined as the ratio of the Force that exhibits over any fluid to the unit area. The force is measured in terms of Newtons and denoted by “N”, the area is measured in terms of meters and denoted by m2 (square meter). So, the unit of pressure is N/m2 (pronounce as Newton per square meter).

Pressure Gauge, Working Principle Of Pressure Gauge - Its Types, Advantages

The pressure gauge is simple in construction and sensitive in nature. The pressure gauge is installed in the path of fluid flows or fixed to the storage tanks. If it is fixed in the path of fluid flow, then the fluid will touch the pressure gauge and responses will be shown over the display with the help of an indicator. If the pressure gauge is fixed to the fluid storage tank then the fluid is allowed to move against the pressure gauge then due to its mechanism, the pressure gauge will respond and shows the value.

Pressure Gauge, Working Principle Of Pressure Gauge - Its Types, Advantages

The pressure can be observed in terms of N/m2 or MPa (pronounce as Mega Pascal) or even in Psi

Advantages Of Pressure Gauge:

The advantages of the pressure gauge are

  • The Pressure Gauge is simple in construction and can be used at every application of fluids.
  • The pressure gauge is easy to operate and no risk involved in the installation.
  • The pressure gauge does not require any Power and Electricity for its work.
  • The response of the pressure gauge while measuring is fast and quick.
  • The requirement of any operator or human involvement is not necessary is an additional advantage of pressure gauge.
  • As the pressure is analog type, it is easy to find the pressure of any fluid.
  • In few applications, the fluids will be dynamic and result in vibration of components whereas; even at vibrations, the pressure gauge will be accurate and no false data will be observed.

Applications Of Pressure Gauge:

The applications of pressure gauge are wide and can observe in our daily life too. A few applications of pressure gauge are

  • The pressure gauge is used to measure the fluid’s behavior in Industries and Companies.
  • Applications of Pressure gauge are vastly used in storage tanks.
  • A pressure gauge is used in Boilers to check and inspect the pressures of fluids.
  • The pressure gauge is used in Air-Stations for inspecting the air volume in Tyres.
  • A pressure Gauge is used to check the temperature variations too.


The pressure gauge is all about measuring the fluids in different situations; it is nothing but the finding out of the behavior of the fluids at static and dynamic conditions. As the pressure gauge is a precision instrument, it is used in a vast range. We do even find those applications in our regular life. The various types of pressure gauge can be observed according to the applications. The internal mechanism varies in the types of pressure gauge.

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