Process Control

At the onset of the Industrial Revolution, processes were controlled manually. Men turned valves, pulled levers or changed switches based on the need to turn devices on or off. As the technology of process control evolved,the human links in the process were replaced by products that could automatically make the mechanical adjustments that were necessary, and make them accurately and consistently. This resulted in increased efficiency and greater productivity from the machine, process and operator.
Today, the process industry experiences greater demands for productivity and efficiency. The request for more exotic materials have enhanced the development of products that provide more exacting control. Process control techniques have advanced to include PID, or three-mode, control. Three-mode control (Proportional, Integral and Derivative) furnishes energy in exact accordance with the load of your process instead of in steps that may not match the load requirements. PID control is further defined in this article to explain how it may provide the exacting control necessary for many industrial processes.