Edwards Signaling SD-ST SD Series SuperDuct 4-Wire Smoke Sensor with Terminals

For reliable smoke monitoring in confined HVAC spaces, the Edwards Signaling SD-ST SuperDuct 4-Wire Smoke Sensor delivers a compact, maintenance-friendly solution. Designed as a duct & beam smoke detector, the SuperDuct’s less-than-2" depth makes it ideal for retrofit applications where space is limited. Its patented differential sensing and environmental compensation reduce nuisance alarms caused by dust or gradual environmental changes while remaining highly responsive to rapid smoke events. Rated for air velocities from 100 to 4,000 ft/min and compatible with common power options (including 24V DC and 120V AC), the SD-ST integrates easily into building security and fire safety systems. Removable filters, conformally coated PCBs and optional water-resistant gaskets protect electronics in demanding HVAC conditions, lowering lifecycle maintenance costs. Standard RJ45 modular connections, cover-visible status LEDs, and magnet-activated test/reset further streamline installation and service. Ideal for commercial HVAC, data centers, warehouses and other critical monitoring applications, the Edwards Signaling SuperDuct provides dependable, low-profile detection for integrated security and fire protection systems. Contact sales to specify for your facility or request a quote today.

• Slim, low-profile design (<2") that fits tight ductwork to simplify retrofits and reduce installation labor
• Differential sensing with environmental compensation to minimize false alarms and improve monitoring reliability
• Removable dust filters, conformal-coated circuit boards and optional gasket to extend service life in harsh HVAC environments
• Flexible integration via RJ45 interconnect and remote controller support (controller up to 15 ft; up to 15 controllers for coordinated fan shutdown)
• Quick visual status with cover-visible LEDs and magnet-activated test/dirty/reset for fast maintenance and troubleshooting