The gaze forward is followed by the gaze upward. The True Presence was developed as the first true presence detector. It reliably reports whether a person is in the room or not. This makes secure absence detection possible for the first time. With this information, lighting can be controlled reliably, without delays, and unnecessary electricity costs can be avoided. Its knowledge of actual presence or absence also offers many additional applications that are of great value for building management. Thus, it sets a new standard in modern building automation.