System Sensor D4120W - Smoke Detector - Duct Smoke Detector,
System Sensor D4120W - Smoke Detector - Duct Smoke Detector,

System Sensor D4120W - Smoke Detector - Duct Smoke Detector,

System Sensor 4 Wire Wthr Prf Duct
Part Number: 674181
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System Sensor D4120W | Watertight 4-Wire Photoelectric Duct Smoke Detector, 24VDC/120VAC

The InnovairFlex D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water. D4120W duct smoke detector features a pivoting housing that fits various applications: both square and rectangular footprints mount to round or rectangular ductwork.

This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute, temperatures of -4ºF to 158ºF, and a humidity range of 0 to 95 percent (noncondensing). A plug-in sensor head offers superior false alarm immunity. These features, plus a NEMA 4 rating, allow operators to mount the detector to rooftop HVAC equipment or use the detector in other harsh environments.

The new design provides the same form, fit, and wiring terminations as the standard InnovairFlex unit. Superior test and operational features added to the standard model are also available in this watertight unit. As the only watertight duct smoke detector on the market, D4120W provides unsurpassed environmental protection while simplifying installation, testing, and maintenance.

This InnovairFlex duct smoke detector can be customized to meet local codes and specifications without additional wiring. The new InnovairFlex product line is compatible with all previous Innovair models, including remote test accessories.

WARNING: Duct smoke detectors are NOT a substitute for open area smoke detectors; NOT a substitute for early warning detection; NOT a replacement for a building’s regular fire detection system. Refer to NFPA 72 and 90A for additional information.

NOTE: To maintain the watertight properties of this duct smoke detector, watertight conduit and fittings must be used. Mount the product with the conduit holes facing downwards, if possible

The InnovairFlex D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water. D4120W duct smoke detector features a pivoting housing that fits various applications: both square and rectangular footprints mount to round or rectangular ductwork.

This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (noncondensing). A plug-in sensor head offers superior false alarm immunity.

These features, plus a NEMA 4 rating, allow operators to mount the detector to rooftop HVAC equipment or use the detector in other harsh environments. The new design provides the same form, fit, and wiring terminations as the standard InnovairFlex unit. Superior test and operational features added to the standard model are also available in this watertight unit.

As the only watertight duct smoke detector on the market, D4120W provides unsurpassed environmental protection while simplifying installation, testing, and maintenance.




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System Sensor - D4120W - Features

  • NEMA Type 4 UL listed for non-hazardous indoor and outdoor applications
  • UV Resistant, UL listed housing and cover material
  • 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
  • Plug-in sensor offers superb false alarm immunity and the latest sensor technology
  • Broad ranges for operating temperature (-4ºF to 158ºF) and humidity (0% to 95% non-condensing)
  • Patentesampling tube installs from front or back of the detector with no tools required
  • Increased wiring space with a newly added 3/4-inch conduit knockout
  • One easy-access Test/Reset button and improved LED status
  • Patented interconnect feature for multi-fan hutdown
  • New high contrast terminal designations
  • Built-in short circuit protection from operator wiring errors
  • Field selectable settings for configuring the detector
  • Two DPDT Form-C relay contacts
  • 24 V AC/DC or 120 V AC
  • Backward compatibility with eing Innovair products, including remote accessories
  • NEMA Type 4 UL listed for non-hazardous indoor and outdoor applications
  • 4-Wire Photoelectric, integrated low-flow technology
  • UV Resistant, UL listed housing and cover materia
  • 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
  • Plug-in sensor offers superb false alarm immunity and 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 a newly added ¾-inch conduit knockout
  • One easy-access Test/Reset button and improved LED status
  • General Information
  • Name: System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector, 24VDC/120VAC, Honeywell International, Inc, System Sensor
  • Category: System Sensor, Fire, Fire Detection Devices, Duct Smoke Detectors
  • UPC Code: 783863034541
  • Country of Origin: Mexico. Country of origin is subject to change.



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System Sensor - D4120W - Product Categories

  • Security
  • Fire Alarm Systems
  • Smoke and Heat Detection



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System Sensor - D4120W - Specifications

Device TypeSmoke Detector
PropertyPhotoelectric
UNSPSC Code46171600
Brand NameSystem Sensor
Connectivity TechnologyWired
ManufacturerHoneywell International, Inc
Manufacturer Part NumberD4120W
Product LineInnovairFlex
Product ModelD4120W
Product NameInnovairFlex D4120W Smoke Detector
Product TypeSmoke Detector



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System Sensor - D4120W - Physical Characteristics

Application/UsageAir Duct Protection
Depth2.5"
Depth (mm)63.5
Form FactorDuct Mount
Technical Information-
Detectable MediumSmoke
Maximum Air Velocity20.32 m/s
Sensing TechnologyPhotoelectric
Sensor TypePhotoelectric



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System Sensor - D4120W - Documents and Downloads

System Sensor D4120W Specification SheetClick to View
System Sensor D4120W Product Data SheetClick to View
System Sensor D4120W User ManualClick to View
System Sensor D4120W Installation InstructionsClick to View

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