The 4WT-B is a 4-wire, photoelectric i3 smoke detector with a 135°F fixed thermal sensor.

NOTE: Four wire smoke detectors should be used as “replacement” models for older systems using four wire life safety devices.  For new installations (modern panels) you should purchase a two wire model.

• Alarm Contact Ratings:0.5 A @ 30V AC/DC
• Alarm Current:20mA max. @ 12V, 23mA @ 24V
• Detection:Photoelectric
• Dimensions:2.0″ (51mm) H x 5.3″ (127mm) Dia.
• Freeze Trouble:41°F (5°C)
• Heat Sensor:135°F (57.2°C) fixed
• Maximum Ripple Voltage:30% of nominal (peak to peak)
• Operating Humidity Range:0% to 95% RH, non-condensing
• Operating Temperature Range:32° to 100°F (0° to 37.8°C)
• Operating Voltage:12/24 V non-polarized nominal, 8.5 min. to 35 max.
• Sensitivity:2.5%/ft. nominal
• Standby Current:50 µA max. avg.
• Weight:6.3 oz. (178 g)
• Wiring Gauge:14-22 AWG
• Wiring:4-wire

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