FSL-851+B501

The NOTIFIER FSP-851 is an intelligent addressable photoelectric smoke detector from the 851 Series for FlashScan and CLIP SLC systems, featuring a unique optical sensing chamber for wide-range smoke detection.
Paired with the B501 standard 4-inch mounting base, it supports plug-in installation with rotary decimal addressing (1-159 FlashScan), stable communication, and dual-color LEDs for 360° visibility.
Key Specifications
Feature
Specification
Type
Photoelectric smoke sensor (FSP-851 head) ​
Base
B501 (4" flangeless standard mounting) ​
Sensitivity
0.5-2.35% obs/ft (panel-programmable) ​
Voltage
15-32 VDC (SLC loop-powered) ​
Current
Standby: 250-360 µA; Alarm: ≤7 mA @ 24 VDC ​
Size
2.1" H x 4.1" D (with B501 base) ​
Temp/Humidity
32°F-120°F (0°C-49°C); 10-93% RH