The new SHD 200 control unit from Krohne provides two solid-state relays for process control. These relays provide capabilities such as a status output, which occurs according to NE 107 signalization ...

By Jim Ford, PhD. Just over a decade ago, an article titled, "Advanced Control Strategies Move into the Field" (Control, October 2008), highlighted three evolving trends in the process control world ...

Process control valve flow characteristics make regular loop tuning a necessity. Understanding the basics can ease the frustration and ensure loop stability. But first, some basics about why this ...