Notifier FSP-851A

Low-profile intelligent photoelectric sensor. ULC Listed.

Condition: New
Brand: Notifier
Status: Obsolete
SKU: 4518
Manufacturer Part #: FSP-851A


Notifier FSP-851(A) Series intelligent plug-in smoke detectors with integral communication provide features that surpass conventional detectors. Detector sensitivity can be programmed in the control panel software. Sensitivity is continuously monitored and reported to the panel. Point ID capability allows each detector’s address to be set with rotary, decimal address switches, providing exact detector location for selective maintenance when chamber contamination reaches an unacceptable level.

The FSP-851(A) photoelectric detector’s unique optical sensing chamber is engineered to sense smoke produced by a wide range of combustion sources.


Additional information

Weight 0.2 lbs
Dimensions 4.00 × 4.00 × 2.00 in



Honeywell International



Unit of Measurement

EA (Each)


Rotary Dials

Material Qualities

Fire Resistant

Detection Method



Production Status




  • Sleek, low-profile design.
  • Addressable-analog communication.
  • Stable communication technique with noise immunity.
  • Low standby current.
  • Two-wire SLC connection.
  • Compatible with FlashScan® and CLIP protocol systems.
  • Rotary, decimal addressing (1-99 on CLIP systems, 1-159 on FlashScan systems).
  • Optional remote, single-gang LED accessory.
  • Dual LED design provides 360° viewing angle.
  • Visible bi-color LEDs blink green every time the detector is addressed, and illuminate steady red on alarm (FlashScan systems only).
  • Remote test feature from the panel.
  • Walk test with address display (an address on 121 will blink the detector LED: 12-[pause]-1 (FlashScan systems only).
  • Built-in functional test switch activated by external magnet.
  • Built-in tamper-resistant feature.
  • Sealed against back pressure.
  • Constructed of off-white fire-resistant plastic, designed to commercial standards, and offers an attractive appearance.
  • 94-5V plastic flammability rating.
  • SEMS screws for wiring of the separate base.


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