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  • Build reliability in during design

    Instrumentation that promises to improve reliability may not always be what they seem. You have to consider whether a site can properly maintain sophisticated instruments.

    Dirk Willard
  • Improve control loop performance

    Specification of control valves doesn’t adequately emphasize the very basic requirement that valve position respond in a timely manner or even at all — leading to process variability.

    Gregory K. McMillan, Emerson Process Management
  • Blind Transmitters: A return to the basics

    Analog transmitters easily send process measurements from different areas in a plant to a central PLC where process control decisions can be made based on transmitter feedback. Analog transmitters are great cost-saving alternatives to single-point controllers. In situations where multiple sensing locations are required, single point controllers’ costs can add up quickly.

  • Monthly Preview: December 2007

    Here's a look at what will soon be featured on Be sure to check back for the latest articles, news and columns before you see it in print.

  • Equipment & Services: October

    Chemical Processing's Equipment & Services feature provides a variety of production equipment, supplier services and parts.

  • Diagnostics dig deeper

    Today’s plants come ready equipped with their own team of doctors in the shape of the many diagnostic and monitoring systems incorporated into instrumentation and other process equipment. And, like any good doctor, today’s plant diagnostics can look beyond the symptoms of poorly performing instruments and provide insights into the health of the process itself.

    Mike Spear, editor at large
  • Biomass fuel production gets sweeter

    Improved instrumentation and control strategies allow biofuel producers to reap the benefits of new processing techniques and advanced control strategies.

    David W. Spitzer, CONTROL Contributor
  • Achieve continuous safety improvement

    Enhancing safety performance requires diligence and unrelenting effort. The Independent Safety Review Panel’s recently released report on the safety culture and practices at BP’s U.S. refineries where a March 2005 explosion occurred in Texas City, Texas indicates similar failings are likely elsewhere in the industry. Learn what can be done to enhance continuous safety improvement.

    Angela Summers, SIS-TECH Solutions
  • Equipment & Services: March

    Chemical Processing's Equipment & Services feature provides a variety of production equipment, supplier services and parts.

  • Don’t shackle yourself to the wrong platform

    Today, process data are readily available at many levels, from instrumentation to higher-level data historians and OPC servers. Choosing the right platform can be key to successfully implementing robust and maintainable process calculations at your company.

    Dane Overfield, Exele Information Systems
  • Distillation control and optimization, Part 3

    Control's Béla Lipták continues his series on control of distillation processes, this time focusing on managing reboiler flow, temperature, feed rate, loading and reflux for economy, stability and safety.

    Béla Lipták, PE, CONTROL Columnist
  • Keep measurements on the level

    This article looks at six technologies — mechanical floats and displacers, differential pressure, capacitance, ultrasonic, radar, and guided wave radar — that are used most often for automated control, and provides practical guidance for choosing among them.

    Jerry Boisvert, Siemens Energy & Automation
  • Level transmitter — art not science

    There is much more to setting up a transmitter than a mere equation. Design and control errors can certainly compromise performance. Follow these simple tricks to get it right.

    Dirk Willard
  • Choose the right temperature sensor

    There’s no simple solution to achieving accurate temperature measurement. It’s a combination of knowing the inherent accuracy of particular sensor types, and how environmental factors can create further measurement uncertainty and the sensor calibration techniques available to reduce this uncertainty.

    Cal Swanson, Watlow Electric Manufacturing Co.
  • Today’s China Syndrome

    The country boasts not just booming exports but a strong desire for the best technology.

    Mike Spear, editor at large
  • Process engineering: Dryer provides a concrete lesson in control

    Removing water or moisture from a liquid stream is a critical operation in many processes. Liquid stream dryers commonly contain either molecular sieves or adsorbents; during the last 20 years, the use of molecular sieves has become much more common.

    Andrew Sloley, contributing editor, and Richard Readshaw, senior staff process engineer for VECO USA Inc.
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