2-Wire Sounder and Relay Smoke Detector

Product Overview

2WTA-B 2-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. It also contains a piezoelectric horn which generates the ANSI S3.41 temporal pattern in an alarm condition.


  • Full line of options including:
    – 85 dB sounder
    – Form C relay
    – Isolated thermal sensor
  • 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