System Sensor DUCTSD Smoke Detector

Protect critical HVAC and ventilation systems with the System Sensor DUCTSD duct smoke detector — a dependable low-flow photoelectric solution built for commercial and industrial applications. The DUCTSD delivers precise smoke detection across a wide air velocity range (100–4,000 fpm), minimizing nuisance alarms while providing accurate monitoring in variable airflow environments. Its plug-in sensor and patented sampling tube that installs from the front or back without tools speed up service and reduce downtime during maintenance. With AC/DC power options (including 120V/230V AC and multiple DC voltages), two DPDT relay outputs, and a patented interconnect for multi-fan shutdown, the DUCTSD easily integrates into existing fire alarm, building management, and security systems. High-contrast terminal designations, an integrated smoke test port, and built-in short-circuit protection simplify installation and help prevent wiring errors. Ideal for ductwork monitoring, HVAC safety, and comprehensive security and surveillance portfolios, the System Sensor DUCTSD offers reliable performance where airflow and early detection matter most. Add the DUCTSD to your next HVAC, fire safety, or security project — order now or contact our sales team for integration support.

• Reliable low-flow smoke monitoring designed for HVAC and duct applications, reducing false alarms with photoelectric sensing
• Fast, tool-free installation with front/back patented sampling tube and plug-in sensor for minimal downtime
• Wide air velocity coverage (100–4,000 fpm) ensures consistent detection across variable airflow conditions
• Built-in short-circuit protection and clear terminal labeling simplify wiring and reduce installation errors
• Two DPDT relay contacts and interconnect for multi-fan shutdown enable seamless integration with fire panels and building management systems