Motion detector
How does a STEINEL motion detector work? 

The principle and mode of operation of motion detectors differ depending on the technology with which the motion detector is equipped.  STEINEL offers motion detectors with passive infrared technology as well as with high-frequency technology.

STEINEL Motion detector - switch with eye
STEINEL infrared sensors respond to heat radiation from moving people and switch lights on, for example, and off again after an adjustable time.

STEINEL infrared sensors also retrofit lights that have already been installed with contemporary convenience.

  • Long range and detection angles from 130° up to 360° for a wide variety of applications.
  • Creep under protection for uninterrupted monitoring.
  • Reliable function even in unfavorable weather conditions.
  • Individual setting of twilight threshold and switching duration.
  • Easy, trouble-free installation and mounting even on outside or inside corners.
  • Also ideal for use in indoor areas such as hallways or basements.

Light ON. Light OFF.
Sensor controlled
Automatic luminaires are realized with the help of motion sensors. Two different technologies are used here: for indoor areas, HF sensors are the optimal solution; for outdoor areas, only passive infrared (PIR) sensors are used.


Heat radiation as a remote switch
The heart of a PIR sensor system is a so-called pyrosensor. This electronic component reacts 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 detected by the sensor when they enter the system's field of view. 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 body crosses a zone boundary, the IR radiation received changes for the sensor and it emits a signal.

Multisensor technology
STEINEL has developed multisensor technology for particularly high demands on the size of the detection zone. Here, two or even three pyro sensors are arranged at a special angle to each other within the system so that their detection ranges add up.