Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security.
hilmor Trades Month Save 10%
Hurricane Recovery Programs & Flood Damage Info - Click Here

4-Wire Photoelectric Water tight Duct Smoke Detector

Item: SS-D4120W
MFR: D4120W

Store Inventory

Sign in to see real-time inventory at the stores closest to you.
What’s the price?
Sign in for pricing.

About This Product

Product Info


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.
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.


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
Detection MethodPhotoelectric
Digital ReadoutNo
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
Sensor TypePhotoelectric
StandardsUL, FM, CSFM
Terminal ConnectionYes
Test ButtonYes
TypeDuct Smoke Detector
UL ListedYes
UL RecognizedNo
Visual AlertNo
Warranty OfferedYes
Wire GaugeUp to 12 AWG


Equipment Part List

*Win a Mule for the Yule is valid thru December 31, 2018. No purchase necessary. View Complete Terms & Conditions.
*Honeywell Fall 2018 Promotion. No purchase necessary. View official rules.
Shop Honeywell products