The 4WT-B is a 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.

Features

• 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