Very sturdy enclosure, IP rating seems genuine. Good value for money.
🔍 Hover to zoomReliable duct-mounted smoke detection for HVAC systems with photoelectric sensing technology to protect commercial buildings from fire spread through air handling systems.
| Brand | Honeywell |
| Model | SD505-DUCTR |
| Voltage | 24V DC |
| Country of Origin | USA |
| Weight | 1.8 lbs |
| Dimensions | 9.5 x 7.25 x 2.25 inches |
| Warranty | 3 years |
| Certifications | UL 268A, ULC, CSFM, FM Approved |
| SKU / MPN | SD505-DUCTR |
| What’s in the box | Duct smoke detector housing, mounting template, installation manual, sampling tubes |
| Detection Type | Photoelectric |
| Operating Voltage | 24V DC |
| Air Velocity Range | 100 to 4000 ft/min |
| Operating Temperature | -4°F to 158°F (-20°C to 70°C) |
| Relay Outputs | Form C (SPDT) alarm and trouble |
| Mounting | HVAC Duct |
Key benefits: Photoelectric sensor for early smoke detection, wide air velocity range, easy installation in HVAC ducts, compatible with Silent Knight fire alarm panels, low-profile design, reliable relay outputs for fan shutdown
Typical applications: Commercial HVAC systems, air handling units, hospital ventilation, school and university buildings, office complexes, data centers, industrial facilities, clean rooms
Lifecycle: Active product, currently manufactured and supported with long-term availability
Very sturdy enclosure, IP rating seems genuine. Good value for money.
Please contact us if you need product documentation or technical information.





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