FIRERAY PRODUCT GUIDE
Page 2
2 What is an Optical Beam Smoke Detector
2.1 Definition
An Optical Beam Smoke Detector comprises of a Transmitter, a Receiver and a Control Unit
The Transmitter is an infrared light source that generates and projects a modulated infrared
(invisible) light beam over an area to the Receiver.
The Receiver is a photosensitive sensor that forwards the signal to a Control unit.
The Control Unit, which can be a separate or integrated unit (depending on the type of Optical
Beam Smoke Detector) analyses the signal information and communicates with the Fire Alarm
Control Panel (FACP) on the status of the Optical Beam Smoke Detector
Core: The effective region corresponds to the Core area, which will connect the Transmitter with the
Receiver / Reflector. The Core region contains sufficient IR energy to operate the system.
Scattered Region: The energy is Scattered Region is not sufficient to ensure reliable operation of
the system.
Edge: The transition area between Core and the Scattered Region.
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