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Wired smoke detectors
Digital Security Controlsâ€™ (DSC) wired photoelectric smoke detectors, the FSA-210 and FSA-410, feature integral dual-sensor heat detection, automatic drift compensation and a replaceable chamber. The two-wired FSA-210 and the four-wired FSA-410 have built-in alarm horns and are ULC-S531 and ULC-268 listed for commercial and residential installations. Digital Security Controls Ltd.