REGIN S65-OE Optical smoke detector for ceiling mounting, without socket

REGIN S65-OE Optical smoke detector for ceiling mounting, without socket
The optical detector reacts to visible smoke particles (residues from combustion). It works according to the reflection principle and consists of a measuring chamber that has air-inlets via a labyrinth which keeps out ambient light. An infrared LED and a photo transistor are placed in the
measuring chamber. They are located so the light from the LED doesn’t shine on the light sensitive transistor. If smoke particles enter the measuring chamber some of the light from the LED will be reflected by the particles and hit the photo transistor, which activates the alarm. For the correct function of the detector, it is necessary to purchase a REGIN S-BP or REGIN S-BPR-S65 mounting socket.
Alarm indication: The detector has a clearly visible red LED on the housing. The LED is normally off and lights up when there is a fire alarm.
Service alarm: A red LED lights up on the detector and a yellow LED on the connected control unit ABV... when the detector is so contaminated that the service alarm is triggered. The detector must then be cleaned. The service alarm is reset when the detector is cleaned and re-installed.