List the Types of Pressure Gauges

The variations in pressure gauges are reliant on where the gauge will be used, with different styles, and materials intended to fit specific applications. There are numerous ways pressure gauges are considered and defined, including by usage, and the method which is used to measure pressure as described in Elsamed China.

Types of Pressure:

Pressure is divided as

Hydrostatic Pressure: 

Hydrostatic pressure is made by the weight of a liquid above a measurement point when the fluid is at rest. The height of the liquid affects the hydrostatic pressure. The hydrostatic possessions of a liquid are not continuous and are inclined by liquid density and gravity.

Mechanical Pressure: 

Mechanical pressure is measured by diaphragm or Bourdon tube which converts fluid pressure into force. 

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Absolute Pressure:

Absolute pressure is when pressure is weighed relative to a vacuum.

Gauge Pressure: 

Gauge pressure is relative to atmospheric pressure. This form of pressure is optimistic when it is above atmospheric pressure and harmful when it is below atmospheric pressure.

Differential Pressure: 

Differential pressure is measuring the variance between two types of applied pressure. This form of pressure measurement does not have an orientation but measures the two applied pressures.

Pressure Gauges Types:

Bourdon Tube Pressure Gauge:

This has an elastic tube that is soldered on one end hooked on a socket. A change in pressure causes refraction in the tube; this is relative to the applied pressure and is sent to a rotating gear with a pointer. The working principle of a Bourdon pressure gauge is that a bent tube will straighten when pressure is practical which is indicated by a digital readout. Bourdon tube pressure gauges can be used to measure pressure up to 1000 bar. They have an accuracy among ± 0.1% and ± 2.5% and are made of brass or a nickel alloy.

Diaphragm Pressure Gauge:

A diaphragm pressure gauge is elastic and develops when pressure is practical. This type of pressure gauge works as a Bourdon pressure gauge but trials pressure using a diaphragm. The diaphragm, which is placed amid two flanges, is used to control the difference between the applied pressure and reference pressure. It can amount pressure as high as 40 bar of gas, and fluids. The main use of a diaphragm pressure gauge is for the measurement of low-level pressure.

Capsule Pressure Gauge:

A capsule pressure gauge has two thin, corrugated diaphragms that are sealed together around the circumferences. When pressure is given to it, the diaphragms expand or get contracted. This change in shape makes a good rotary movement that appears on the face of the gauge. 

Absolute Pressure Gauge:

Absolute pressure gauges are used to calculate pressure independent of the natural variations in atmospheric pressure. A reference vacuum is devoted to the side of the measuring element, it has zero pressure without variation. A diaphragm splits the media chamber from the vacuum chamber and distorts into the vacuum chamber as pressure increases. The deformation and change are transformed into a pressure value.

Differential Pressure Gauge:

Differential pressure gauges calculate the difference among the pressure in two chambers that are unglued by an element that moves back and forth rendering to the changes in pressure. The program of the element causes a drive in the pointer on the gauge. One of the ports of the gauge is connected on the high side, while the other is located on the low side which shows a pressure drop on the gauge.

Bellows Pressure Gauge:

The bellows in a bellows pressure gauge are made of thin-walled springy metal linked tubes that form a shape like an accordion; As pressure is practical, it acts on the bellows on the free end, causing it to enlarge and produce movement. Bellows pressure gauges are very subtle and used for low-weight applications. There are 2 forms of bellows gauges. In one form, pressure is applied to the bellows, and in another form, it uses the differential pressure principle with the bellows.

Manometer Pressure Gauge:

Manometer pressure gauges measure pressure on a fluid by matching one column of fluid in contradiction of the second column of fluid. This type of pressure gauge is the unassuming type and contains a transparent tube that is partially filled with a manometric liquid like mercury. 

Piezometer Pressure Gauge:

A piezometer is a type of manometer that can be used to calculate the average pressure range of liquids; it is a very simple glass tube that is exposed at both ends. One end is linked to a pipeline where the pressure of a fluid is to be slow, while the other end is exposed to the atmosphere. The tube is devoted vertically such that the liquid in the pipe can increase into the tube. The pressure reading is designated by the height of the fluid in the tube.


Pressure is measured by the perpendicular force applied per unit area, a calculation that is measured through the use of diverse techniques and methods as explained in Elsamed China. The correct measurement of pressure is reliant on the reference the pressure reading is measured in contrast to.

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