System Sensor 4W-B White 4-Wire Photoelectric i3 Series Smoke Detector delivers reliable fire detection with intelligent maintenance features that help reduce nuisance alarms and simplify long-term system management. Its plug-in design, included mounting base, and flexible installation options make it ideal for commercial and residential fire alarm applications.

• Photoelectric smoke sensing technology provides dependable detection for a wide range of fire conditions
• 4-wire design with included mounting base supports straightforward installation and system integration
• Stop-Drop ’N Lock attachment allows quick detector installation and removal for maintenance
• Drift compensation and advanced signal processing help minimize false alarms and maintain accuracy
• Dual-color wide-angle LED indicators provide clear visual status for normal operation, maintenance, and alarm conditions