The Notifier FSP-851 is an intelligent, low-profile photoelectric smoke detector designed for use on Notifier FlashScan and CLIP addressable fire alarm systems. Its sleek, low-profile housing makes it ideal for modern commercial environments where aesthetics matter, while its advanced photoelectric sensing chamber delivers reliable, early-warning smoke detection that minimizes nuisance alarms.
The FSP-851 uses light-scattering photoelectric technology to detect the slow-smoldering fires most common in commercial occupancies — the type of fire that produces large combustion particles before flames ignite. It communicates continuously with the host panel using Notifier’s FlashScan protocol, providing real-time status and the ability to conduct automatic device testing and diagnostics from the panel.
Whether you’re replacing an aging detector in a Notifier system or expanding an existing installation, the FSP-851 is a direct plug-in replacement for most standard Notifier bases (B501, B210LP, B501BH), making upgrades fast and cost-effective.
Key Features
- FlashScan and CLIP dual-protocol addressable communication
- Low-profile design — only 1.5 inches tall for unobtrusive ceiling mounting
- Photoelectric sensing chamber optimized for slow, smoldering fires
- Automatic drift compensation for long-term sensitivity maintenance
- LED status indicator — blinks normal, steady in alarm
- Built-in address switch — no external programmer needed
- Compatible with standard Notifier B501, B210LP, and B501BH bases
- UL 268 listed; meets NFPA 72 requirements
Specifications
- Protocol: FlashScan / CLIP (Notifier addressable)
- Operating Voltage: 15–32V DC (loop powered)
- Standby Current: 300 µA
- Alarm Current: 6 mA
- Operating Temperature: 32°F to 100°F (0°C to 38°C)
- Humidity: 10–93% RH non-condensing
Compatible Panels
- Notifier NFS-320 / NFS-320SYS
- Notifier NFS2-3030
- Notifier NFS2-640 / NFS-640
- Notifier AFP-300 / AFP-400
- Notifier NFS-3030
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | .5 lbs |
|---|---|
| Dimensions | 4.5 × 4.25 × 2 in |
| Condition | New |
| Part Type | Intelligent, Smoke Detector |
| Manufacturers | Notifier |
| Compatible Panels | NFS-320, NFS2-640, NFS2-3030, AFP-200, AFP-300, AFP-400, AFP-1010 |
| Compatible Bases | B300-6, B210LP |
| Cross Reference | FSP-851, FSP-951, FSP-951-IV |
| Type | Photoelectric, Protocol: FlashScan SLC Addressable, Housing: White, Profile: Low-profile, Generation: Legacy (predecessor to FSP-951) |
