System Sensor 2151 This smoke detector is fairly rare. Brand System SensorModel 2151Manufacturer System SensorType Smoke Detector (Photoelectric, 4-wire)
Cerberus Pyrotronics EH-24S Category : Cerberus PyrotronicsThis alarm is essentially a 4-wire, Cerberus Pyrotronics-branded version of the Wheelock EHS-DL1.
Notifier NAR-10 Category : NotifierThe only difference between this and the Fire-Lite BG-10 is the text on the pull.
Fiquench 20-051+20-047 Category : Fiquench/FikeThis alarm was clearly meant for a Halon fire suppression system. 20-051 is the model of the horn and 20-047...