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System Sensor SBBGRL L-Series
1 Spkr Crct
surface mount bases used with Potter’s addressable detectors
24 Red Led Module
Grsw Room Side Wiring Plate Required
Siemens FDO421 (S54320-F4-A1) Smoke Detector Sale System Sensor SBBGRL L-SeriesSiemens FDO421 (S54320 F4 A1) Photoelectric Smoke Detector Model FDO421 incorporates an optical sensor using a light scattering detection principle. The device utilizes advanced software algorithms to analyze the signals and provides highly stable and accurate smoke detection. Model FDO421 also uses state of the art microprocessor circuitry with error checks, detector self diagnostics, and supervision programs. Each detector is UL 268 7th edition
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