System Sensor Smoke Detector

System Sensor Smoke Detectors: Professional-Grade Fire Detection Since 1984

System Sensor has been a cornerstone of the commercial fire protection industry since its founding in 1984. Smoke detectors sit at the heart of the brand's identity, and decades of engineering refinement have produced product lines that professionals in commercial, industrial, and mission-critical environments trust without hesitation. As a subsidiary of Honeywell, System Sensor brings the resources of a global safety leader to every detector it manufactures.

A Legacy of Smoke Detection Innovation

System Sensor's evolution in smoke detection is well documented. In the 1990s, System Sensor introduced a line of smoke detectors including the 1400 2-wire Ionization detector and the 2400 2-wire Photoelectric detector — establishing early credibility in the professional fire alarm market. In the 2000s, System Sensor introduced the i3 line of smoke detectors, which came in 2- and 4-wire models, featuring the ability to poll the fire alarm panel when the sensor becomes dirty, triggering a trouble condition on the panel — a practical maintenance innovation that reduced unnecessary manual inspections.

The i3 Series: The Core of the Lineup

System Sensor's i3 Series is the core of the line: conventional photoelectric smoke detectors with plug-in installation, LED indicators, and drift compensation to reduce false alarms — built for easy install and instant inspection, with no separate auxiliary power supply, transformer, or backup battery required. They come in 2-wire and 4-wire models, as photoelectric or combination photoelectric/thermal with a fixed 135°F heat sensor, alongside low-profile detectors like the 2151T.

Advanced Multi-Criteria and Intelligent Detection

System Sensor, a division of Honeywell, developed the Advanced Multi-Criteria Detector, which uses four independent sensors to distinguish between real fires and false alarms. This multi-criteria approach dramatically reduces nuisance alarms — a persistent challenge in commercial environments — while maintaining the sensitivity that life safety demands. The System Sensor 200 Series intelligent smoke detectors offer precise point location, programmable sensitivity, and continuous monitoring, with addressable detection for accurate alarm communication and selective maintenance.

HVAC Duct Smoke Detection

System Sensor also addresses smoke detection in HVAC systems through its dedicated duct detector line. InnovairFlex™ duct smoke detectors greatly simplify HVAC system monitoring — one unit can accommodate multiple installation footprints to overcome mounting constraints, while tool-free, plug-in sampling tubes speed and simplify installation. InnovairFlex comes with status indicators, ready-to-access test features, and a remote test station that simplifies testing and maintenance.

Built for Professionals, Trusted Across Industries

The System Sensor spot detector line covers a vast array of needs in commercial or residential applications, offering conventional and intelligent detectors for smoke, heat, fire, and CO detection — supporting all fire hazard detection and safety needs. From schools to hospitals to commercial spaces, System Sensor products deliver the kind of consistent protection professionals depend on. Many System Sensor products are built to work with various fire alarm control panels from leading manufacturers, though compatibility can vary depending on the specific model and communication protocols used.

Whether you're specifying detectors for a new installation or replacing aging equipment in an existing system, System Sensor's smoke detector lineup offers a proven, professionally vetted solution. Explore the full System Sensor brand catalog to find the right detector for your application.