The Notifier FSD-751RPL is an intelligent low-flow photoelectric duct smoke detector with an integral DPDT relay. It detects smoke in HVAC ducts across a wide airflow range. As a result, the system can shut down fans and blowers to limit smoke spread.
Low-Flow Duct Detection
The FSD-751RPL samples air moving through a duct. It performs reliably from 100 to 4,000 feet per minute. A telescopic sampling tube draws the air sample across the sensor. Therefore, the detector suits both low- and high-velocity duct applications.
FlashScan Communication and Relay
The detector communicates over Notifier’s FlashScan addressable protocol. FlashScan supports addresses 0 through 159. In addition, an onboard DPDT relay switches auxiliary equipment directly. So the device can command fan shutdown for NFPA 90A duct applications.
Compatible Panels and Accessories
The FSD-751RPL works with all Notifier addressable panels. Common examples include the NFS-320, NFS2-640, and NFS2-3030. An RA400Z remote annunciator shows status away from the duct. Furthermore, the RTS451 or RTS451KEY remote test station allows convenient testing. A sampling tube is required and sold separately, sized to the duct width.
Specifications
- Air velocity: 100 to 4,000 ft/min
- Operating voltage: 20 to 30 VDC (auxiliary 24 VAC/VDC or 120/240 VAC for relay accessories)
- Standby current: 300 microamps at 24 VDC
- Operating temperature: 32°F to 131°F
- Dimensions: 14.75 in. L x 5.50 in. W x 2.75 in. D; weight 3.90 lb
- DPDT alarm contacts: 10 A at 30 VDC; 10 A at 277 VAC
- Listings: UL, ULC, CSFM, FM, and MEA approved
Order the Notifier FSD-751RPL
Life Safety Consultants stocks the Notifier FSD-751RPL with sampling tubes and test accessories. To size a tube for your duct, call 1-888-557-0558. Alternatively, 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 | 8 lbs |
|---|---|
| Dimensions | 13 × 11 × 7 in |
| Condition | New |
| Part Type | Duct Detector / Housing, Intelligent, Photoelectric |
| Manufacturers | Notifier |
| Compatible Panels | NFS-320, NFS2-640, NFS2-3030 |
| Compatible Bases | N/A – duct detector with integrated housing |
| Cross Reference | FSD-751RPL, FSD-751PL, FSD-751PLA |
| Type | Duct Smoke Detector, Protocol: FlashScan SLC Addressable, Feature: Remote Pilot Light (RPL), Application: HVAC low-flow duct detection, Standard: NFPA 90A |








