Sensors using socalled "combined technology" have two or more different technologies combined in one unit. With this combination the disadvantages of each individual technology can be compensated and at the same time their strengths are conjoined for the applications' ideal performance.
Combined technologies are used for the combined activation and safety at automatic doors. Besides, these sensors offer plenty of auxiliary functions which contribute to a substantial enhancement of the comfort around the door.
An presence detector is always comprised of one industrial transmitter and at least two receiver chips with high quality optical systems. These are mounted on the sensor's PCB (modular system) or integrated into a pre-assembled housing (individual detection). The scanning range is set by means of a mechanical micro-speed unit by changing the angle between the transmitter and receiver. This optical procedure is called triangulation or optical differential measurement. Several beams can be combined in the modular system to form lines.
Presence detectors are ideal for edge and pinch protection on revolving and sliding professional doors and as ride-along anti-collision protection on swing doors. They can also be used for small areas such as kitchen and service areas of restaurants and hotels or as a person industrial counter in shopping centers.
