ISA Certified Automation Professional (CAP) program

Sheble, Nicholas
January 2006
InTech;Jan2006, Vol. 53 Issue 1, p51
The article focuses on the effectiveness of the radar level detector in measuring liquid levels, a topic encompassed in the Certified Automation Professional program of the Instrumentation, Systems, and Automation Society certification in January 2006. Such detector can measure the level of a liquid with a dielectric constant greater than two in a horizontal vessel with changing composition and temperature. The fact that the tank is horizontal indicates that the angle of the beam will be narrow at the surface, while the vessel walls will not interfere. Radar has the ability to detect the smallest change in the level of the surface. As long as the beam is narrow and the dielectric constant of the fluid is greater than two, the radar does not depend upon the temperature or composition of the fluid.


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