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| Tools & Home Improvement > Safety & Security > Fire Safety > Smoke Alarms |
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| Product Description Its supervisory relay is normally energized, and triggers with power loss, providing power supervision. The relay also trips if the detector's self-diagnostics detect an electronic failure, or if the detector is outside the UL listed sensitivity range for more than one day.The GE Security ESL 449CTE is a self-diagnostic, four-wire smoke detector with an extra relay that provides two added functions: power supervision and sensitivity status. GE Security 449CTE Self-Diagnostic Photoelectric 4-Wire Smoke Detector w/Heat Sensor and Status Relay, 12/24VDC. Integral 135 F Fixed Temperature/Rat Shipping Weight: 9.6 ounces | ||||||||
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