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4-Wire Photoelectric Water Tight Duct Smoke Detector

Item: SS-D4120W
MFR: D4120W

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About This Product

Product Info


4-Wire Photoelectric Water Tight Duct Smoke Detector
  • NEMA Type 4 UL listed for non-hazardous indoor and outdoor applications.
  • 4-Wire Photoelectric, integrated low-flow technology.
  • Plug-in sensor offers superb false alarm immunity and the latest sensor technology.
Warning: this product contains a chemical known to the State of California to cause cancer.


Weight3.35 Pounds (lbs)
Width5 Inches (In)
Height2.5 Inches (In)
Country of OriginMEX
Length14.38 Inches (In)
ApplicationDuct Smoke Detection
ApprovalsUL, FM, CSFM
Audible AlertNo
Batteries IncludedNo
Batteries RequiredNo
Battery BackupNo
BrandSystem Sensor
Contact RatingAlarm initiation contacts (SPST) 2.0A @ 30 VDC (resistive)Alarm auxiliary contatcs (DPDT) 10A @30 VDC (resistive)10A @250 VAC (resistive)1/2 HP @240 VAC1/4 HP @120 VACNOTE: Alarm auxiliary contacts shall not be connected to initiating circuits ofcontrol p
CUL ListedNo
Cycle/Hertz50/60 Hz
Detection MethodPhotoelectric
Hush ButtonNo
Interconnection Capability100
Locking PinNo
Maximum Voltage120 VAC
MountingDuct Mount
Operating Temperature-4°F to 158°F (-20°C to 70°C)
Operating Temperature Range-4°F to 158°F (-20°C to 70°C)
Power SourceDC
Prop 65Yes
Sensor TypePhotoelectric
StandardsUL, FM, CSFM
Terminal ConnectionYes
Test ButtonYes
TypeDuct Smoke Detector
UL ListedYes
UL RecognizedNo
Visual AlertNo
Voltage120 VAC
Warranty OfferedYes
Wire GaugeUp to 12 AWG


Equipment Part List