System Sensor 4WTA-B Smoke & Thermal - 4 Wire

System Sensor 4WTA-B Smoke & Thermal - 4 Wire   The 4WTA-B is a 4-wire, photoelectric i3 smoke detector with a 135°F fixed thermal sensor, and has local sounder. This would be a updated / upgrade from the 4WT-B detector. Replacement for the the 4WT-B. 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