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SpectrAlert® Advance outdoor audible visible products are rich with features that cut installation times and maximize profits
24 Red Led Module
surface mount bases used with Potter’s addressable detectors
25A Power Supply
Siemens FDO421 (S54320-F4-A1) Smoke Detector Sale SpectrAlert® Advance outdoor audible visibleSiemens 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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