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System Sensor DUCTSD - 4-Wire Photoelectric Low-Flow Duct Smoke Detector, 24 VAC/DC, 120 VAC, 50-60 Hz

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The System Sensor DUCTSD Series duct smoke detectors with a cover integrated smoke test port and fl exible confi gurations provides effi cient installation and maintenance.

  • 4-Wire Photoelectric, integrated low-flow technology
  • Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 m/sec)
  • Versatile mounting options: square or rectangular configuration
  • Cover integrated smoke test port
  • Plug-in sensor offers the latest sensor technology
  • Broad ranges for operating temperature (–4°F to 158°F) and humidity (0% to 95% non-condensing)
  • Patented sampling tube installs from front or back of the detector with no tools required
  • Increased wiring space with an added ¾-inch conduit knockout
  • One easy-access Test/Reset button
  • Patented interconnect feature for multi-fan shutdown
  • High contrast terminal designations and wiring diagram label make wiring easy
  • Built-in short circuit protection from operator wiring errors
  • Two DPDT Form-C relay contacts
  • 24 VAC/DC or 120 VAC
  • Compatible with existing System Sennsor duct smoke products, including remote accessories RTS151 and RTS151KEY


NameSystem Sensor DUCTSD - 4-Wire Photoelectric Low-Flow Duct Smoke Detector, 24 VAC/DC, 120 VAC, 50-60 Hz
Gemaire Item NumberDUCTSD
Manufacturer Product NumberDUCTSD
SKU - PIM Number1459499548473
ERP Number388375
Unit of MeasureEA
Weight2.5 Pounds (Lb)
Length14.4 Inches (In)
Width2.5 Inches (In)
Height5.0 Inches (In)
Country of OriginMEX
BrandSystem Sensor
Voltage120 VAC/24 VDC
Maximum Voltage120 VAC
Power Source24 VAC/DC or 120 VAC
Cycle/Hertz50/60 Hz
Batteries IncludedNo
Hush ButtonNo
Test ButtonYes
Audible AlertNo
Battery BackupNo
Batteries RequiredNo
Detection MethodPhotoelectric
Sensor TypePhotoelectric
ApplicationDuct Smoke Detection
ApprovalsUL, FM
Connection TypeWired
Contact Rating2.0A @ 30 VDC
Interconnection CapabilityUp to 30 units
Locking PinYes
MountingDuct Mount
Operating Temperature Range-4°F to 158°F (-20°C to 70°C)
Switch ActionNone
Terminal ConnectionYes
TypeDuct Smoke Detector
Visual AlertNo
Warranty OfferedYes
Wire GaugeUp to 12 AWG
CUL ListedNo
UL ListedYes
UL RecognizedYes
GEM - Case Quantity


Parts List