GE selsyns are electromechanical devices used for the convenient and accurate transmission of angular data between two or more remote points. The transmission is accomplished electrically without any mechanical connection between the two units. The system generally consists of a master transmitter and a receiver. Most selsyn applications are for measurement and position indication. For instance, is the valve open or closed, or what is the angle of the lift bridge?

GE selsyns may be used to operate equipment requiring mechanical inputs such as dial indicators, valves, dampers and many other applications in manufacturing and processing plants, municipal utilities and metal plants.