System Sensor OSI-R-SS Reflected Type Beam Smoke Detector, 4-Wire, Single-Ended, 8" Reflector and Integral Sensitivity Test, (Replaces BEAM1224)

Ideal for protecting large-volume spaces, the System Sensor OSI-R-SS reflective beam smoke detector delivers dependable optical fire detection for warehouses, atriums and industrial facilities. This conventional, single-ended 4-wire beam unit combines transmitter and receiver in one housing, reducing installation time and wiring complexity. With a long-range coverage of 5–100 m (16–328 ft) and automatic sensitivity threshold setting, the OSI-R-SS maintains accurate smoke monitoring while simplifying testing and maintenance. Built-in features — including an imager heater, resistance to strong light saturation, and ±1° movement tolerance — help prevent nuisance alarms caused by sunlight, dust or building movement. Directional LED cross-hair alignment and broad beam adjustment make setup quick for security and surveillance integrators integrating the detector into fire alarm systems. Backed by a 3-year limited warranty and compatibility with System Sensor test stations, the OSI-R-SS is engineered for reliable, low-maintenance protection in critical spaces. Add this beam smoke detector to your next fire protection or security monitoring design to improve coverage and reduce lifecycle costs.

• Protects large open areas such as warehouses and atriums with reliable optical detection across a 5–100 m (16–328 ft) coverage range.
• Simplifies installation with a single-ended 4-wire design so only one side needs wiring, saving time on labor and cabling.
• Integral sensitivity test and automatic threshold setting reduce routine maintenance and ensure consistent performance for fire alarm monitoring.
• Built-in imager heater and tolerance for ±1° building movement minimize false alarms from environmental changes and direct sunlight exposure.
• Fast alignment with directional LED cross-hair arrows and wide 12° field of view plus 50° horizontal/20° vertical adjustment speeds commissioning and service.