Automatic doors are operated by capturing an activation signal to the door controller through sensor, and followed by using gear motor to move the belt and pulley. This type of automatic door is equipped with microwave rador sensor that detects uni-directional movement only. In simpler terms, the automatic door will be opened when there is movement approaching the entance while ignoring any departing movement. With a long history since establishment, DORMA has developed into an international producer of door technology products and systems.