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Sunday, 24 December 2017

CLASSIFICATION OF PRESSURE MEASURING DEVICES

We were discussing the basic definition and significance of Pascal’s Law along with its derivation , Vapour pressure and cavitation and also the basic concept of Absolute pressure,Gauge pressure, Atmospheric pressure and Vacuum pressure in our previous posts. 

Today we will understand here the basic concept behind the measurement of pressure at a point in fluid in the subject of fluid mechanics with the help of this post. 

We will also secure here the various types of devices used for pressure measurement. Further, we will see each type of pressure measuring device in detail. 

Pressure at a point in fluid will be measured by following two devices as mentioned here.
1. Manometers
2. Mechanical Gauge

Let us first discuss here “Manometers”

Manometers are basically defined as the devices used for measuring the pressure at a point in a fluid by balancing the fluid column by same or another fluid column. 

Manometers are further classified in two basic types as mentioned here
1. Simple manometers
2. Differential Manometers

Mechanical Gauge

Mechanical gauges are basically defined as the devices used for measuring the pressure at a point in a fluid by balancing the fluid column by the spring or dead weight. 

There are following four types of mechanical gauges as mentioned here

1. Diaphragm Pressure gauge
2. Bourdon tube pressure gauge
3. Dead- weight pressure gauge
4. Bellows pressure gauge
We will discuss now the pressure measuring devices “Simple manometers” and “Differential Manometers” in detail in our next post.
 
Do you have any suggestions? Please write in comment box.

Reference:

Fluid mechanics by R. K. Bansal
Image Courtesy: Google

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