Description
Product Summary
The System Sensor D4120 Low Flow Duct Smoke Detector, 4 Wire is a professional-grade replacement part from System Sensor. The D4120 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions. Plug-in sensor head off.
Duct smoke detectors sense smoke in the HVAC air stream and shut down air handlers to keep smoke from spreading through a building, as required by many mechanical and fire codes for systems above 2,000 CFM. This group includes detector housings, sampling tubes, remote test stations, annunciators, and accessories.
Key Features
- 4-wire Photoelectric, integrated low-flow technology
- Backward compatible with existing accessories
- Built-in short circuit protection
- Easy access Test/Reset button
- Field selectable configuration settings
- High contrast terminal designations
- Increased wiring space
- Plug-in sensor
- Square or rectangular mounting options
- Two DPDT relay contacts
Specifications
| Brand | System Sensor |
|---|---|
| Part Number | D4120 |
| Part Type | Duct Smoke Detector |
| Operating Temperature | -4°F to 158°F (-40°C to 70°C) |
| Operating Humidity | 0 to 95% RH (Non-condensing) |
| Air Duct Velocity | 100 to 4000 ft/min |
Related Parts
Commonly used with: Supco ETX, Supco DST5, Supco DST42, Supco DST34, Supco DST3, Supco DST22, Supco DST2.5, Supco DST2, Supco DST10, Supco DST1.5, Supco DST1.
White Paper
- System Sensor D4120 Product Specification Sheet (PDF)
- System Sensor D4120 Installation & Operation Manual (PDF)
What's Included
- (1) System Sensor D4120 Low Flow Duct Smoke Detector, 4 Wire
Safety: Always disconnect power and follow lockout/tagout procedures before servicing electrical components. Installation should be performed by a qualified technician.
