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The 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.

Features

• 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

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