4-Wire Photoelectric Smoke Detector

Product Overview

4W-B 4-wire Photoelectric smoke detectors. All models incorporate a state-of-the-art optical sensing chamber.


  • Plug-in detector line – mounting base included
  • Large wire entry port
  • In-line terminals with SEMS screws
  • Mounts to octagonal and single-gang backboxes, 4-square backboxes, or direct to ceiling
  • Stop-Drop ’N Lock™ attachment to base
  • Removable detector cover and chamber for easy cleaning
  • Built-in remote maintenance signaling
  • Drift compensation and smoothing algorithms
  • Simplified sensitivity measurement
  • Wide angle, dual colour LED indication
  • Loop testing via EZ Walk feature
  • Built-in test switch