The Simplex 4098-9687 Stand Alone Duct Detector represents a critical component for comprehensive fire detection within commercial HVAC systems. Engineered to provide early smoke detection in ventilation and air handling units, this detector monitors airflow passages to detect potential fire risks before they can spread through building ductwork. Designed for seamless integration with commercial fire alarm infrastructures, the unit delivers reliable performance across diverse environmental conditions.
Utilizing advanced photoelectric sensing technology, the 4098-9687 detector can be installed in ducts with a minimum cross-section of 8 inches square or 18 inches round. Its stand-alone configuration eliminates the requirement for a dedicated fire alarm control panel, offering flexible deployment in various commercial and institutional settings such as office complexes, healthcare facilities, educational institutions, and industrial environments.
The detector’s robust design incorporates a TrueAlarm 4098-9601 photoelectric sensor, providing precise smoke detection with minimal nuisance alarms. Compatible with multiple power configurations, this unit supports 120 VAC, 24 VAC, and 24 VDC power sources, making it adaptable to existing electrical infrastructures.
Key Features
- UL 268A listed for comprehensive fire detection reliability
- Stand-alone operation without requiring dedicated fire alarm control panel
- Form C relay output capable of 5A switching at 120 VAC or 28 VDC
- Compatible with minimum duct sizes of 8in square or 18in round
- Integrated TrueAlarm photoelectric sensor for precise smoke detection
- Multi-voltage power input supporting 120 VAC, 24 VAC, and 24 VDC configurations
Specifications
- Power Input: 120 VAC / 24 VAC / 24 VDC
- Relay Output: Form C, 5A @ 120 VAC or 28 VDC
- Minimum Duct Size: 8in square or 18in round
- Internal Detector: 4098-9601 TrueAlarm photoelectric
- Compliance: NFPA 72, UL 268A listed
Ideal for NFPA 72 compliant fire alarm system installations, the Simplex 4098-9687 provides critical early warning capabilities in commercial building environmental control systems. Facilities managers and fire alarm contractors can rely on this detector’s proven performance and versatile design for comprehensive smoke detection strategies.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 3 lbs |
|---|---|
| Dimensions | 11 × 11 × 6 in |
| Condition | New |
| Manufacturers | Simplex |
| Compatible Panels | Stand-alone (no FACP required) |
| Cross Reference | 0631142 |
| Power | 120 VAC / 24 VAC / 24 VDC, Relay: Form C 5A @ 120 VAC or 28 VDC, Min duct: 8in square or 18in round, Internal detector: 4098-9601 TrueAlarm photoelectric, UL 268A listed |







