This ppt is basically for mechanical engineers i.e. it is a topic of fluid mechanics. It can also be used in measuring techniques. This topic is really very vast but to give it in brief, this presentation is more than enough.
Pressure Mechanical Gauges
B.Tech ECE I Yr
Mechanical Gauges are the best instruments to
measure High Fluid Pressure in hydraulics
engineering, where Tube Gauge cannot be
The principle on which all Gauges work is
Bourdon Tube Pressure Gauges
Invented by E. Bourdon.
Pressure responsive element is made up of
bronze & steel in tube from.
Outer end is closed and free to move.
Inner end is connected to the point where
pressure is to be measured.
Due to increase in pressure elliptical shape
converts into circular, and this movement is
measured thorough link & pinion.
Diaphragm Pressure Gauge
Pressure responsive element is an elastic steel
Elastic deformation of diaphragm under
pressure is transmitted to a pointer by similar
arrangement as in first case.
Bellows Pressure Gauge
Pressure responsive element is made of
metallic tube having deep circumferential
During increase or decrease of pressure, elastic
element expand & contrasts that reads on
Dead Weight Pressure Gauge
It is a balancing device.
It consist of a Piston and a Cylinder of known
area and connected to a Fluid by a Tube.
By changing the Weight on the Piston, the
Pressure on the Fluid is calculated and marked
on the Pointer.