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[ pdf ] PRESSURE TYPE INSTRUMENTS

PRESSURE TYPE INSTRUMENTS Download
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Topic under  Level Measurement
Source: www.indumart.com 
File size: 96.76 KB
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Last download on: Thu Apr 12, 2018 05:07:57 AM
Short Desciption:
Pressure is exerted force per unit area. The pressure at a given depth, in a static liquid, is a result of the weight of the liquid acting on a unit area at that depth plus any pressure acting on the surface of the liquid. Level measurement based on pressure measurement is also referred to as hydrostatic tank gauging. Pressure is not really a vector even though it looks like it in the sketches. The arrows indicate the direction of the force that the pressure would exert on a surface that it is contact with. Moreover, the pressure at a given depth does not depend upon the shape of the vessel containing the liquid or the amount of liquid in the vessel; only the variations of the height of the liquid column in an open tank for a specific liquid at a certain temperature will determine the force at the bottom of the tank.

Summary:
In part one of this series of articles, level measurement using a floating system was discusses and the instruments were recommended for each application. In the second part of these articles, level measurement with the aid of pressure instruments will be discussed.
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