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System Sensor 4WT-B Smoke Detector w/ Thermal Sensor








4WTB Smoke Detector w/ Thermal Sensor
Replacement For System Sensor 2112/24TB, 2112/24TD, 2112/24TS, 2412THB


Detection: Photoelectric

Wiring: 4-wire

Heat Sensor: 135°F (57.2°C) fixed

Operating Voltage: 12/24 V non-polarized nominal, 8.5 min. to 35 max.

Maximum Ripple Voltage: 30% of nominal (peak to peak)

Alarm Current: 20mA max. @ 12V, 23mA @ 24V

Standby Current: 50 µA max. avg.

Alarm Contact Ratings: 0.5 A @ 30V AC/DC

Temperature Range: 32° to 100°F (0° to 37.8°C)

Humidity Range: 0% to 95% RH, noncondensing

Freeze Trouble: 41°F (5°C)

Sensitivity: 2.5%/ft. nominal

Wiring Gauge: 14-22 AWG

Dimensions: 2.0" (51mm) H x 5.3" (127mm) Dia.

Weight: 6.3 oz. (178 g)


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  • Model: System Sensor 4WT-B
  • 0 Units in Stock
  • Manufactured by: System Sensor

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