System Sensor OSI-R-SS Conventional Reflective Imaging Beam Smoke Detector

This conventional, single-ended beam smoke detector is easy to install – only one side needs to be wire

Features

• Combined transmitter/receiver unit
• Wide 12° field of view
• Fast, easy, and intuitive beam alignment indicated by directional LED cross-hair arrows
• Long range coverage of 5-100 m (16-328 ft) is standard; no separate long-range kit required
• Highly resistant to building movement; tolerates +/- 1° movement
• Resistant to strong light sources; does not alarm when saturated by sunlight
• Resistant to solid object intrusion
• Automatic sensitivity threshold level setting
• 50° horizontal and 20° vertical beam adjustment
• Built-in imager heater is standard
• Remote test station capable for electronic simulated smoke test from ground level
• Standby, fault and alarm LED indicators visible from the front and bottom
• Automatic drift compensation
• Paintable housing/cover
• Removable plug-in terminal blocks
• Optional heater kit available for the reflector

OSI-R-SS is a 4-wire conventional reflector-type linear optical beam smoke detector for use in fire alarm systems. The beam operates primarily on the principle of light obscuration using an infrared beam. Optical beam smoke detectors are uniquely suited to protecting buildings with large open areas with high ceilings such as a warehouse or atrium. The OSI-R-SS detector is a combined transmitter/receiver unit that can be directly connected to a conventional detector circuit.

Fast and Easy Alignment
Aligning the imager to the reflector is extremely intuitive, fast, and accurate. Both the infrared transmitter and the CMOS imager are contained in a moveable “eyeball” – an adjustable lens assembly that can move +/- 20° in the vertical direction and 50° in the horizontal direction.

Four LED arrows indicate the direction to move the lens, guiding the user to find the imager’s perfect alignment with the reflector. Once the optimum alignment is found, indicated by all green arrows, the lens is locked with a slide lever. A paintable cover is then placed over the front to secure the lever in locked position. 

Resistant to Building Movement
The infrared transmitter and receiver imager generates a beam of light towards a high-efficiency reflector. The reflector returns the beam to the receiver where the received signal is analysed. The change in the strength of the received signal when smoke enters the area between the unit and the reflector is used to determine the alarm condition. The receiver imager has a wide 12° field of view that automatically tracks the reflector in case of building movement or movement of its support structure. It is virtually impossible for the receiver to lose sight of the reflector from its field of view without structural damage being caused to the building. As a result of this operation, OSI-R-SS is highly resistant to building movement, eliminating the number one cause of false alarms and/or faults with traditional beam detectors.

Resistant to Sunlight 
Optical filtering, high-speed image acquisition and intelligent 
software algorithms provide the OSI-R-SS system with higher levels of stability and greater resistance to high level lighting variability. This provides better resistance to sunlight in its field of view, helping to prevent false alarms when saturated by sunlight, reflected sunlight or any other very bright light sources. The worst-case scenario is for the detector to go into a trouble condition unlike other traditional beam detectors which go into alarm. 

Resistant to Foreign Object Intrusion
Advanced smoke imaging techniques allow the detector to avoid false alarms from partial and sudden blockage from foreign object intrusion. 

Time-saving Automatic Sensitivity Setting
Unique in the market, the sensitivity of the detector is selected and set automatically at the optimum sensitivity based on the size of the reflector measured in the field of view.

Drift Compensation
The detector incorporates automatic drift compensation, whereby the detector will adjust its detection thresholds in line with any long-term signal reduction of the beam caused by dust or other contamination of the optical surfaces.

Equipped with Built-in Imager Heater 
The imager ships standard with an internal heating option to prevent condensation on the optical surface. (External power supply required.) 

OSI-R-SS Datasheet