Edwards Signaling FX-PDD Intelligent Addressable Duct Smoke Detector

Protect critical spaces with the Edwards Signaling FX-PDD intelligent addressable duct smoke detector — built for reliable, low-profile detection inside HVAC ducts where space is limited. This duct smoke detector uses photoelectric sensing and environmental compensation to deliver stable, drift-free sensitivity (0.79%–2.46% obscuration/ft.), so you get consistent smoke detection across a wide operating range (32–120°F) and air velocities from 100 to 4,000 ft/min. At just 1.9" deep, the FX-PDD simplifies installs and retrofits while standard sampling tube spacing and a rotatable tube let you migrate from other units without duct modifications. Visible status LEDs and a cover monitor switch speed troubleshooting and improve security integration with fire alarm and building automation systems. The addressable design and one Form C auxiliary relay make it easy to command HVAC shutdown or integrate with monitoring and surveillance systems, and the magnet-activated test switch allows maintenance without special tools. Ideal for commercial HVAC, data centers, hospitals, and schools — add the Edwards Signaling FX-PDD to your life-safety and building monitoring strategy today.

• Low-profile 1.9" design for easy installation in tight HVAC ducts, reducing retrofit time and labor
• Addressable photoelectric detection with environmental compensation for stable, drift-free monitoring
• Visible status LEDs and cover monitor switch for fast diagnostics and tamper protection
• Standard sampling tube spacing and rotatable tube for quick drop-in migration and correct airflow alignment (100–4,000 ft/min)
• Form C auxiliary relay and magnet-activated test switch to control HVAC shutdown and simplify maintenance without special tools