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Air Products and Controls 4 Wire Conventional Duct Smoke Detector

System Sensor #2D51. Duct Smoke Detector Head, Conventional, Photo.

APC Conventional Duct Smoke Detector SL-2000-P Installed But Unused

System Sensor #2D51. Duct Smoke Detector Head, Conventional, Photo.

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APC RW 024-P /4-WIRE CONVENTIONAL DUCT SMOKE DETECTOR/ WITHOUT COVER/FUNCTIONAL