used WORKING painted covers System Sensor DH400 ACDCP w/Duct Smoke Detector

System Sensor D4120 4-Wire Photoelectric Duct Smoke Detector

System Sensor D4120 Photoelectric Duct Smoke Detector Used UNTESTED Sold AS IS

System Sensor LD4S Duct Smoke Detector

System Sensor D4120 4 Wire Photoelectric Duct Smoke Detector

System Sensor YD4120 For Smoke Detector Duct Application. Used W/o Clear Shield

System Sensor D4120W Watertight 4-Wire Duct Smoke Detector

System Sensor DNR ECL Intelligent Non-Relay Duct Smoke Detector Innovair Flex