Encoders Go Barrier-less in Hazardous Locations

With today’s widespread demand for energy, oil exploration and production are critical to the global economy. Drilling companies and equipment manufacturers are continually looking for ways to improve efficiency and save cost while improving production. In most drilling applications encoders are used to provide position and speed feedback for proper control of equipment like top drives, draw works, and pipe racking systems. However, encoders are electronic devices so they require special attention when used in hazardous environments such as a drilling platform. The energy contained within a typical industrial encoder circuit must not be allowed to ignite vapors and gases present in the drilling process, and there are several methods used to accomplish this. In this paper we will discuss some of the current options, their drawbacks, and a potential solution.