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  • Optical Smoke Detector
    4275 5000

    Availability: In stock

    AD-333 series include 2-wire and 4-wire detectors, which provide fast and reliable response to photoelectric smoke and heat (1350F) detection. While the smoke and heat detection circuits operate independently, their outputs being "OR" connected. The detector provide the fire detection performance by acting as a smoke sensor and / or a 1350F heat detector at the same location.