Instrumentation : Pressure Guage explained

Pressure gauge, is the instrument used to measure the pressure/force that the fluid(liquid or gas) exerts on unit area of container when at rest .

The video explains about the working of a pressure gauge and the bourdon tube present inside the pressure gauge. Bourdon tube was invented by Eugene Bourdon in the year 1849.  The C-type bourdon tube used in today’s pressure gauges has a slight elliptical cross section with its tube bent into a c-shape or arc length of 27 degree, is the pressure sensing component inside the pressure gauge. 

Working Principle :

It works on the principle, cross-sectional tubing when deformed in any way will tend to regain its circular form under the action of pressure.

Additional reference :

http://www.instrumentationtoday.com/bourdon-tube/2011/09/