Light ON. Light OFF.
Automatic lights are realized with the help of motion sensors. Two different technologies are used:
Indoors, RF sensors are the optimal solution; outdoors, Passive Infrared (PIR) sensors are used exclusively.
Thermal radiation as a remote switch
The heart of a PIR sensor system is a so-called pyrosensor. This electronic component responds to changes in the incident infrared heat radiation with a change in voltage.
Since every person emits infrared radiation due to their body heat, they inevitably change the thermal image captured by the sensor when they enter the system's field of view thermal image captured by the sensor. The resulting voltage jump is processed by the electronics to switch light.
In order to be able to react to movements within the detection range, the sensor systems are equipped with a segment lens. It divides the field of view of the pyrodetector into active and passive (not visible to the sensor) zones. If a heat source crosses a zone boundary, the received the IR radiation received by the sensor changes and it emits a signal.
STEINEL has developed multisensor technology to meet particularly stringent requirements in terms of the size of the detection zone. Here, two or even three pyro system, two or even three pyro sensors are arranged at a special angle to each other so that their detection ranges add up.