System Sensor 2451 Smoke Detector with Base

System Sensor 2451 smoke detector head; NOS. Brand new in sealed box.

System Sensor 2451 Automatic Fine Detector Head

System Sensor 4W-B 4-Wire Photoelectric Smoke Detector with Mounting Base

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

System Sensor SS-Photo Photoelectric Smoke Detector with Base

👀 NEW SYSTEM SENSOR 400 SERIES PLUG IN PHOTOELECTRONIC FIRE DETECTOR HEAD 2451

SYSTEM SENSOR SMOKE DETECTOR