Are there different technologies used for presence detectors?
Yes, there are different technologies. There is, on the one hand, the very common PIR (Passive Infrared) technology, HF (High Frequency) technology and ultrasound technology. The Passive Infrared detects a movement by detecting a change in the form of heat. In HF or double radar technology, changes are detected when the distance to the sensor changes. Ultrasonic detectors react to a change (target-actual comparison) of the ultrasonic waves emitted by the detector and received as reflection in the monitoring range.
Tags: KNX, Light Control, Motion Detection