USI Hardwired and 1-Year Battery Backup Smoke Detector with Photoelectric Sensor

EG&G Lite-Mike 560A 561 Detector Head Optical Light Meter Photometer Powers On

Hansentek Model 120 Spark Detector

COHERENT OP-2 VIS Optical Detector VIS Power Sensor

8x Apollo Orbis ORB-OP-12001-APO Optical Smoke Detector & Bases NEW

System Sensor D4120 Photoelectric Smoke Detector 120VAC with Sampling Tube

RAE Systems RAEALERT Gas Detector Monitor ALARM sensor LCD box LOT OF 3 Part

SURPLUS NEW General Signal C2M-PD1 Two-Wire Photoelectric Smoke Detector