Valve Position Detection in Modern Process Installations

摘要

In the process industry valves and actuators are historically used for controlling and diverting fluid flows. Increasingly the plant engineers want a feedback signal of the current position of valves, taps and actuators in the control system. This feedback is generally obtained by use of inductive sensors which are built into a switchbox, or double sensors which are mounted directly on actuators or the manual valve. This article gives an insight in to the type of sensors that are applied in the field and the emerging trends in the market.