System Sensor 4WT-B Category : System Sensor This 4-wire smoke detector also has a thermal heat sensor. Brand System SensorModel 4WT-BManufacturer System SensorType Smoke/Heat Detector
Whelen Strobe-Alarm Category : OtherThis is a pretty unique all-in-one smoke detector and strobe. The brown cable in the picture is for a 120VAC...
Pyrotronics ES0-24S Category : Cerberus Pyrotronics, PyrotronicsThis is a rebranded Wheelock horn/strobe, and a pretty rare one at that since it has an electronic horn mechanism...
Simplex 4903-9101 Category : SimplexSince this is a ceiling-mount unit, it’s model number is probably different from 4903-9101, but I couldn’t figure out what...