Edwards 403-5A-R 15 Cd Bell Strobe Plate Xtralis Optical beam smoke detectors are

Optical beam smoke detectors are uniquely suited to protecting buildings with large open areas with high ceilings such as a warehouse or atrium

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Edwards 403-5A-R 15 Cd Bell Strobe Plate Xtralis Optical beam smoke detectors areEdwards 403 5A R 15 Cd Bell Strobe Plate, Adapts Bell for Conversion Into Bell Strobe Ul 1971 Listed At 15 Cd, Inchfire Inch Wall Orientation.