4-Wire Photoelectric Smoke Detector

Product Overview

4WT-B 4-Wire Photoelectric smoke detector incorporates a state-of-the-art optical sensing chamber, an advanced microprocessor and features a restorable, built-in fixed temperature (58 °C) thermal detector.


  • 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