Tap to Read ➤

Types of Pressure Gauges And Their Need in Industries

Fatima Rangwala Jun 18, 2019
Here are the types of pressure gauges that are obtainable on the market. If you are looking out for gauges that are used in industrial, commercial, medicinal, or transportation areas, keep reading...
Pressure gauges are devices practically expended in fields where pressure monitoring is executed to its optimum level. The uses of this device is vast. They are used in equipment like processors and compressors where visual monitoring of air and gas pressures is extremely vital.
The general working of a pressure gauge consists of a coiled tube which is linked to gears which in turn measures pressures up to 100,000 pounds per square inch (psi). Well besides the functioning which is not as intricate as one may think, let's just focus on all the types of pressure gauges.

What are Pressure Gauges

Pressure gauges are instruments used for measuring all types of vacuum and pressure operations.
They accurately monitor the pressure being exerted in any operation. In short they are defined as instruments used to measure the pressure and force of a given gas or liquid. The use of these instruments would widely and most commonly be found in the manufacturing industries such as refinery industry, petroleum industry and so on.
The need and practice of these devices have facilitated factory workers to monitor the varying pressure flowing in the industrial gas pipes regularly. Due to which the safety of an industrial plant is maintained in turn.
Hence to maintain such a progress consistently in the world of business the best approach is to establish pressure gauges in every industrial and manufacturing plants. Speaking of which there are many varieties of pressure gauges available in the market but each is entirely used for different operations and applications.
The general working of a pressure gauge consists of a coiled tube which is linked to gears which in turn measures pressures up to 100,000 pounds per square inch (psi). One of the most common pressure gauge that has remained in the industrial history for all these years is the Bourdon Tube invented by Eugene Bourdon from France in 1849.
Still today in this 21st century, the technology of Bourdon tube is widely used to measure a variety of substances like air, water, gas and steam. Well whatsoever be its area of application, pressure gauges are certainly used to add quality, safety and facilitation to our daily life.

Different Types of Pressure Gauges

General-Purpose Bourdon Tube Gauge

This is a type of tube that employs a C-Bourdon tube in its built. The C-Bourdon tube is at an arc of 250 degrees, with a sealed tip end and process pressure attached to a fixed socket end. There are gears and pinion movement inside the tube that controls the response of the pointer on the dial.
Also there is an inside and outside radii in the Bourdon tube that unbends when pressure is applied in the tube. This general-purpose Bourdon tube is mainly used in applications which has high-pressure measurements.

Capsule-Type Gauge

When two pre-formed plates are welded together, a capsule-type gauge is formed. The expansion and contraction of the capsule gauge takes place because of the input process pressures.
It's also due to these pressure gauges which translates the direction of the pointer via pinions and gears. The area of application of these instruments is on an intermediate level.

Duplex Gauge

As the name suggests duplex, means there are two Bourdon tubes fixed inside the gauge casing giving two separate readings. It also suggests two related pressures in an operation.

Differential Gauges

Differential gauges are more like Duplex gauges but are only different in terms of two related pressures. They indicate the difference in pressure within the two points. Differential gauges consists of two entrance ports each of which are connected to the monitored pressure capacities.
So rather than having two pressure gauges checked to calculate the difference, its best to use a differential gauge system to read the pressure differences within two points. Differential gauges are implemented in applications like HVAC, filter conditions and so on.

Piston Differential Gauge

The mentioning of a piston prompts us the original working of a piston in a motorcycle. Piston differential gauge is a diaphragm spring-based system that moves in linear movements in between the two basic pressures. The assembly of this instrument is such that it has a magnet located at the HI pressure side with diaphragm moving alongside.
Also this magnet rotates around another magnet which is located right next to the pressure cavity. Speaking of the pointer location in this gauge, it is situated at the end of the magnet rotary shaft.
So the gauge takes all the readings in proportion to the differential pressures. Its area of application is pretty versatile. It can be used in high-pressure processes as well as for small values.

Tire Pressure Gauge

Tire pressure gauges are categorized into three different types of gauges namely; stick gauges, digital tire pressure gauges and tire pressure gauges. The principal of all the three remains the same, what differs is their display, size and looks.

Pneumatic or Air Pressure Gauges

These pressure gauges are specifically designed to measure the air content in an object during an operation. For instance consider a container such as a tire.
To fill an appropriate and desired amount of air in the tire so as to receive an optimum performance, pneumatic pressure gauges are used to ensure this act. Tires need a considerable and the right amount of air content in it. Too much or too little air in a tire can lead to deplorable situations.

Parallel Bourdon Tube Differential Gauge

In this type, the pinions and gears are designed to calibrate the difference between the translation to a single pointer and the flex of the two Bourdon tubes.

Hydraulic Pressure Gauges

Hydraulic pressure gauges are just ideal for recording and measuring hydraulic tool pressures. Moreover they are used to measure mechanical vibrations and pressure pulses present in the environment or required in certain applications.
Depending on the type of load suspended, some vibrations may be very strong, while others may have a mild effect. Based on this, gauges are equipped with specific liquid like glycerin, so that the movement of the pointer doles out to be much smoother and quicker. Glycerin as a lubricant is extremely safe to use when it comes to service life of an object.

Digital Pressure Gauges

Digital pressure gauges convert differential, hydraulic or pneumatic pressures into signals that exhibits numerical displays. These pressure gauges are better in accuracy, performance, size and readability and are widely used anywhere in any application necessary.
Pressure gauges are one of the utmost reliable and commonly used instruments expended in any industrial and manufacturing purposes. So if you need any help as to which gauge is used when and how, read on.