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• Built-in test switch for easy testing
Model OP921 incorporates an optical sensor using a light-scattering detection principle
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System Sensor RTS151KEY Remote Resting Station Xtralis • Built-in test switch forSystem Sensor RTS151KEY Remote Resting Station designed to test duct smoke detectors conveniently This fire detector accessory features a multi colored LED alternating between steady green and red, making it perfect for 4 wire detectors. It also illuminates red for alarms with 2 wire detectors. Features This testing station has a maximum alarm response time of 40 seconds and boasts a compact design, measuring 4. 6" H x 2. 75" W x 1. 8" D. It operates
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