4-Wire Photoelectric Smoke Detector

Product Overview

4WTR-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 and a Form C relay.


  • Full line of options including:
    – 85 dB sounder
    – Form C relay
    – Isolated thermal sensor
  • Maintains the i3 feature set including:
    - Plug-in design – base included
    - In-line terminals
    - Flexible mounting options
    - Stop-Drop ’N Lock™ attachment to the base
    - Removable cover and chamber
    - Remote maintenance signaling
    - Drift compensation and smoothing algorithms
    - Simplified sensitivity measurement
    - Dual colour LEDs