System Sensor SS-PHOTO Photoelectric Smoke Detector W/Base SEALED

System Sensor SS-Photo Photoelectric Smoke Detector with Base

System Sensor SS-PHOTO Addressable Photoelectric Smoke Detector

System Sensor SS-PHOTO Photoelectric Smoke Detector W/Base SEALED

System Sensor 2151 Photoelectric Low-Profile Plug-In Smoke Detector

System Sensor SS-PHOTO Photoelectric Smoke Detector W/Base SEALED

SYSTEM SENSOR 2W-B SMOKE DETECTOR 2-WIRE PLUG-IN PHOTOELECTRIC WITH BASE

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