System Sensor D4240 4-Wire Photoelectric Duct Smoke Detector
Special Order Item
This item is available by special order. Lead times may vary. Please contact us for availability and estimated delivery.
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Key Features
- Reliable low-flow photoelectric detection reduces false alarms and improves life-safety monitoring in HVAC ducts
- Flexible InnovairFlex design fits square or rectangular ducts for fast, retrofit-friendly installations
- Patented front/back sampling tube installs without tools and plug-in sensor enables quick maintenance and swap-outs
- Supports air velocities from 100'/min to 4,000'/min, ensuring accurate detection across a wide range of airflow conditions
- 4-wire AC/DC design (230V AC / 29V DC) with UL listing and multi-fan shutdown interconnect for code-compliant system integration
- Increased wiring space and 3/4" conduit knockout plus high-contrast terminals simplify installation for contractors and integrators
Quick Specifications
- Product Model
- D4240
- Brand Name
- System Sensor
- Product Line
- InnovairFlex
- Product Name
- 4-Wire Photoelectric Duct Smoke Detector-D4240
Product Information Tabs
Overview
Protect building occupants and critical HVAC infrastructure with the System Sensor D4240 4-Wire Photoelectric Duct Smoke Detector. Designed for reliable duct smoke detection, the InnovairFlex D4240 combines photoelectric, integrated low-flow technology with a plug-in sensor to deliver dependable performance and exceptional false-alarm immunity for security and fire monitoring applications. Rated for air velocities from 100'/min to 4,000'/min (0.5–20.32 m/s), the D4240 performs across diverse duct conditions and supports both 230V AC and 29V DC power for flexible system design.
Contractors and system integrators will appreciate the tool-free patented sampling tube that installs from the front or back, versatile square-to-rectangular mounting, and generous wiring space with a 3/4" conduit knockout. UL listing and a patented interconnect feature for multi-fan shutdown make the detector suitable for code-compliant commercial HVAC and life-safety systems. The D4240 integrates easily into building security, surveillance, and centralized monitoring platforms for coordinated response.
Specify the System Sensor D4240 for your next duct detection project — ideal for retrofits and new installations where reliable duct monitoring and fast serviceability matter.
Features
- Reliable low-flow photoelectric detection reduces false alarms and improves life-safety monitoring in HVAC ducts
- Flexible InnovairFlex design fits square or rectangular ducts for fast, retrofit-friendly installations
- Patented front/back sampling tube installs without tools and plug-in sensor enables quick maintenance and swap-outs
- Supports air velocities from 100'/min to 4,000'/min, ensuring accurate detection across a wide range of airflow conditions
- 4-wire AC/DC design (230V AC / 29V DC) with UL listing and multi-fan shutdown interconnect for code-compliant system integration
- Increased wiring space and 3/4" conduit knockout plus high-contrast terminals simplify installation for contractors and integrators
| General Information | |
|---|---|
| Brand Name | System Sensor |
| Manufacturer | Honeywell International, Inc |
| Product Line | InnovairFlex |
| Product Name | 4-Wire Photoelectric Duct Smoke Detector-D4240 |
| Product Type | Smoke Detector |
| Product Model | D4240 |
| Package Length | 6.500000000 |
| Product Series | InnovairFlex |
| Manufacturer Part Number | D4240 |
| Technical Information | |
| Detectable Medium | Fire |
| Sensing Technology | Photoelectric |
| Connectivity Technology | Wired |
| Certifications | |
| UL Listed | Yes |
| Controls/Indicators | |
| Status Indicators | Yes |
| Physical Characteristics | |
| Depth | 2.5" |
| Width | 5" |
| Power Description | |
| Power Source | AC |
| Input Voltage | 230V AC, 29V DC |
| Miscellaneous | |
| Country of Origin | MX |
| Certifications & Standards | UL Listed |