Duct Smoke Detector-Superduct, 2 or 4 Wire, Conventional

SuperDuct is slim feature-rich alternative to bulky duct smoke detectors. Designed for easy installation and superb reliability, SuperDuct represents the perfect balance of practical design and advanced technology.

SuperDuct detectors feature a unique design that speeds installation and simplifies maintenance. Removable dust filters, conformally coated circuit boards, and optional water-resistant gaskets keep contaminants away from components, ensuring years of trouble-free service. When cleaning is required, the assemblies come apart easily and snap back together in seconds.

SuperDuct detectors use differential sensing to prevent gradual environmental changes from triggering false alarms. A rapid change in environmental conditions, such as smoke from a fire, causes the detector to automatically signal an alarm condition but dust and debris accumulated over time does not change alarm sensitivity.

The detector assembly cover provides easy access to the smoke sensor, its wiring connections, sample and exhaust tube fittings, and the smoke chamber itself. Air enters the detector’s sensing chamber through a sampling tube (ordered separately) that extends into the duct and is directed back into the ventilation system through an exhaust tube (included). The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the detector initiates an alarm.

The four-wire version comes with separable controller and sensor housings and are sold together in the SD-4WJ version.  The terminal version must be ordered as a separate controller (SD-CT) and sensor (SD-ST).  With either version, a second sensor can be interconnected to the base controller with a RJ45 harness (ordered separately SD-RJ5,-RJ10,-RJ15) or wiring in the terminal version.  The one-controller to two-sensor approach is particularly cost-effective when two airstreams must be monitored for fan shut-down, damper control, etc.

The 4-wire units may be installed stand-alone in a HVAC system, without a fire alarm control panel, and power fed from a standard 24Vac source.

Note: Check with your local jurisdiction regarding the installation of the RJ45 harness which may be required to be installed within approved conduit.

Standard Features for the SD-2W Detector

• Less than 2" deep for easy installation and applications where space is tight
• PCB mounted photoelectric detector with onboard intelligence
• Environmental compensation with differential sensing for reliable, stable, and drift-free sensitivity
• Wide 0.79% to 2.46% obscuration/ft. smoke sensitivity
• -4°F to 158°F (-20°C to 70°C) operating range with 100 ft/min. to 4,000 ft/min air velocity rating assures reliability under harsh environmental conditions
• Status LEDs remain visible through clear assembly cover
• Cover monitor switch for added security
• Standard sampling tube spacing for easy drop-in migration from other detectors
• Sampling tube can be installed with or without the cover in place and can be rotated in 45-degree increments to ensure proper alignment with duct airflow
• On-board Alarm, Trouble, and Dirty LEDs
• Magnet-activated test switch
• One Form C auxiliary alarm relay for controlling ancillary equipment (e.g., HVAC controls)
• Easy access to field connection terminals
• Agency Listings: UL, ULC, FM, CSFM, MEA

Standard Features for the SD-4WJ Detector

• Less than 2" deep for easy installation in tight spaces
• Standard RJ45 modular interconnection of a second sensor (SD-SJ)
• PCB mounted photoelectric detector with on-board intelligence
• Environmental compensation with patented differential sensing
• -4°F to 158°F (-20°C to 70°C) operating range
• 100 ft/min. to 4,000 ft/min air velocity rating
• Status LEDs remain visible through clear assembly cover
• Cover tamper reed switch for added security
• Standard sampling tube and mounting holes
• Install in tandem with the controller assembly, or remotely from it
• Sampling tubes install from front-side or back-side of housing
• Magnet-activated test/dirty/reset switch
• No need to open the detector for installation
• Agency Listings: UL, ULC, FM, CSFM, MEA