Flow/Level: For good measure | ISA

Published by Jack Hunter   – June 1, 2011
Categories: Application Notes, Sensors

Selecting servo or radar flow sensor technology for custody transfer considerations

Fast Forward

  • Learn about the principles of servo and radar flow measurement.
  • Selection considerations for custody transfer applications.
  • Servo and radar flow sensor installation considerations.

Several technologies are available for determining the liquid level inside bulk storage tanks. For accurate custody transfer and legal metrology-approved product level measurement, onshore storage tanks use mainly servo or radar technology. Over the years, there have been many industry discussions on whether measuring such applications should be accomplished with servo or with radar technology. This article explains these two measuring principles and provides criteria for selecting which to use in which custody transfer circumstances.


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