The Simplex 4098-9852 is a 10-inch in-duct adapter for Simplex duct smoke detector housings. It mounts a Simplex duct smoke detector inside an air handling unit or duct system.
Duct smoke detection samples air from an HVAC duct, where it can spot smoke moving through the building’s ventilation. As a result, designers use duct detectors to shut down fans and dampers when smoke enters the airstream. In addition, NFPA 90A and NFPA 72 specify duct smoke detection in many large air handlers.
Typical Applications
This adapter fits common commercial HVAC installations. For example, rooftop units, large floor-mount AHUs, and mechanical room ductwork all use in-duct sampling. Therefore, the 4098-9852 is a routine accessory for Simplex duct detector deployments.
Key Features
- 10-inch in-duct adapter for Simplex duct smoke detector housings
- Designed to integrate with the Simplex duct detector product family
- Genuine OEM Simplex part for retrofit and new installs
Notes on Compatibility
The 4098-9852 is sized for 10-inch duct sampling configurations. However, sampling tube length must be matched to the actual duct width on site. Furthermore, confirm the duct detector housing model and orientation against the Simplex installation sheet before ordering.
Order or Get Application Help
Since 2002, Life Safety Consultants has been a source for Simplex duct detector parts and accessories. To order the Simplex 4098-9852 or get sizing guidance, call 1-888-557-0558. You can also email sales@lifesafetycom.com.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 1.3 lbs |
|---|---|
| Dimensions | 8.3 × 8.3 × 7.8 in |
| Condition | New |
| Manufacturers | Simplex |
| Part Type | Replacement Part |







