System Sensor 2WT-B Smoke and Heat Detector

The System Sensor 2WT-B is a conventional 2-wire photoelectric smoke and heat detector from the i3 Series with integrated 135 F fixed-temperature thermal sensing. It includes a pre-wireable mounting base, automatic drift compensation, freeze trouble indication, and wide-angle dual-color LEDs for simplified installation, inspection, and maintenance.

Key Specifications:
Type: Conventional 2-wire photoelectric smoke and heat detector
Core Function(s): Provides photoelectric smoke detection with 135 F fixed-temperature thermal sensing, automatic drift compensation, and local status indication
Thermal Detection: 135 F fixed-temperature heat sensor
Freeze Trouble: 41 F
Power: 12/24 VDC nominal; 8.5 to 35 VDC operating range
Standby Current: 50 uA maximum average
Alarm Current: 130 mA maximum, limited by the control panel
Sensitivity: 2.5%/ft nominal
Indicators/UI: Dual-color LEDs indicate power-up, normal standby, out-of-sensitivity, freeze trouble, and alarm conditions
Mounting: Plug-in detector with included pre-wireable base for octagonal, single-gang, 4-inch square, or direct ceiling mounting
Relay: No built-in relay
Testing: Built-in test switch; supports EZ Walk loop testing with compatible i3 equipment
Remote Functions: Supports remote maintenance signaling and sensitivity monitoring with compatible i3 equipment