Photoelectric smoke detection with 135°F fixed thermal sensor: Provides comprehensive detection of both fast-flaming and smoldering fires
Drift compensation technology: Reduces nuisance alarms caused by dust accumulation over time
4-wire plug-in design with stop drop n lock: Enables quick, secure, and easy installation
Dual-color LED status indicators: Offers clear visual feedback for alarm, maintenance, and trouble conditions
Built-in test switch and maintenance alerts: Simplifies testing and servicing for ongoing reliability
Summarized by Shop
System Sensor 4WT-B — conventional 4-wire i3 series combination photoelectric smoke and heat detector with a 135°F (57.2°C) fixed thermal sensor, supplied as a plug-in head with its mounting base included.
The 4WT-B pairs photoelectric smoke sensing with fixed-temperature heat sensing, so it responds to visible smoke from slow smouldering