System Sensor D4120W Watertight Duct Smoke Detector – New, Original Packaging
System Sensor D4120W Watertight Duct Smoke Detector – New, Original Packaging
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System Sensor D4120W Watertight Duct Smoke Detector – New, Original Packaging

4 stars out of 6 reviews
(4)|
24 ratings

About this item

Need a code-compliant smoke detector for your HVAC system?

System Sensor D4120 duct smoke detector

This System Sensor D4120W is a watertight duct smoke detector.

System Sensor D4120W Watertight 4-Wire Photoelectric Duct Smoke Detector

Brand new, still sealed in original packaging.

No brand listed on this one but it's the real deal.

D4120 Duct Smoke Detector | Regulator Automation

Perfect for commercial applications, air handlers, and ductwork.

System Sensor D4120W Watertight Duct Smoke Detector

Don't skip on safety—get it installed and sleep better.

NEW SYSTEM SENSOR D4120W 4-WIRE DUCT SMOKE DETECTOR *MISSING SENSOR HEAD 2D51

$ 98.50
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4 out of 5 stars
stars24 ratings6 reviews
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