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  • Distillation control and optimization, Part 1

    Control columnist Bela Liptak describes the distillation process and PID-based controls, reviews optimization strategies, and shows how advanced controls can cut operating costs of distillation.

    Béla Lipták, PE, Control Columnist
  • Fieldbus Wars continue: EDDL vs. FDT/DTM

    Fieldbus technology expert Dick Caro predicts that as Ethernet-based control networks converge into the domain of fieldbus, there will eventually be a conflict between OPC/DX, FDT/DTM, and EDDL.

  • Process engineering: Doing your level best

    Plant engineers who find it is difficult to get good level measurements have plenty of company. A recent poll shows that it is considered to be one of the two most vexing problems by process automation professionals.

  • Process engineering: In the trenches of Fieldbus War II

    Like the 20th Century’s Great Conflict, the first Fieldbus War never really ended. But what will the outcome be this time? This article from CONTROL makes an educated prediction on how the battle may turn out.

  • Process Engineering: Measure problems on a higher level

    A reader has a level measurement problem with a differential pressure level transmitter. The transmitter does not track the level properly. Check out the question and the in-depth answer in this contribution from

  • Automation & IT: Making a HART connection

    This article is the first in a series of web-exclusive items designed to increase your knowledge about the HART Field Communications Protocol. Read here to find out the benefits of using HART Communication.

    Ed T. Ladd, Jr., HART Communication Foundation, Austin, Texas
  • Process engineering: Fieldbus is here - are you ready?

    Digital-based protocols, such as those used by fieldbus technology, are finding their way into a wider range of plant automation technologies. Read about the Fieldbus Foundation and how its technology can be implemented at your plant.

    Joe Conklin, Fieldbus Foundation
  • Process engineering: Doing your level best

    Level measurement can be a simple issue with numerous solutions.  Measuring the height of the material in a vessel is merely an interface issue that can be resolved in a variety of ways.

  • Process Engineering: Batch control sets the standard

    It has been nearly a decade since the Instrumentation, Systems and Automation Society (ISA) introduced S88, its first standard for batch control systems.  Its still integral in optimizing operations today.

  • Ph Sensor Neutralizes Gas Scrubber Operation

    There seems to always be a better way to meet regulatory requirements, enhance productivity and lower costs. A new pH sensor may help meet all three goals.

    Paul Aloia, Summit Controls Inc.
  • Expert Advice Maximizes Optimizer Value

    A combination closed-loop optimizer and G2 expert system allowed a largy chemical company to save more than a million dollars in reduced overall energy demand.

    James F. Sturnfield, Union Carbide Corp.
  • Get control of reactor temperatures

    A reader has a plug-flow reactor whose temperature is starting to cycle. The company tried to tuning both controllers but saw no improvement. Read about potential solutions to this reader's problem.

    Diane Dierking, Senior Editor
  • Collaboration extends Its reach

    The step change occurring in engineering technology is being driven by the latest capabilities of design and operating software to exchange these data.

    Nick Basta
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