System Sensor

System Sensor - D4S - 4-Wire Photoelectric Sensor Only Duct Smoke Detector Component

Item: SYSD4S
Loading price
/ EA
Loading Inventory
4-Wire Photoelectric Sensor Only Duct Smoke Detector Component


InnovairFlex™ duct smoke detectors combine an impressive collection of innovations to greatly simplify HVAC system monitoring. One unit can accommodate multiple installation footprints to overcome mounting constraints. Tool-free, plug-in sampling tubes speed and simplify installation. Broad temperature and humidity ranges accommodate exposure to environmental extremes. Easily visible status indications, a readily accessible test feature, and remote test station accessories simplify testing and maintenance. With its unmatched flexibility, InnovairFlex can adjust to fit any application
  • 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 and latest sensor technology help prevent false alarms
  • 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 additional ¾-inch conduit knockout
  • One easy-access Test/Reset button and improved LED status
  • Patented interconnect feature for multi-fan shutdown
  • 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 VAC/DC or 120 VAC
  • Backward compatibility with existing Innovair products, including remote accessories

California residents: see Proposition 65 Warning

Features and Specification

Hush Button No
EAN 0783863034572
Locking Pin No
Batteries Required No
Battery Backup No
Brand System Sensor
CUL Listed No
Detection Method Photoelectric
Digital Readout No
Display No
Wire Gauge Up to 12 AWG
Type Duct Smoke Detector
Standards UL
Terminal Connection Yes
Test Button No
UL Listed Yes
UL Recognized No
UPC 783863034572
Visual Alert No
Voltage 24/120 VAC
Warranty Offered Yes
Maximum Voltage 120 VAC
Batteries Included No
Mounting Duct Mounted
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)
Package Height 4.0000
Sensor Type Photoelectric
Package Length 15.5000
Package Weight 1.8500
Package Width 5.2500
Power Source DC
Approvals UL, FM, CSFM
Audible Alert No
Application Duct Smoke Detection


picture_as_pdf data sheet

picture_as_pdf installation instructions

picture_as_pdf specification sheet