Simplex 2098-9209 This is a photoelectric smoke detector. Brand SimplexModel 2098-9209Manufacturer HochikiType Smoke Detector
Gaylord NC-1357A Category : GaylordI like this unit so much in part because there’s no branding on the front.
System Sensor 5601P Category : System SensorThis is a 135F rate of rise and fixed temp heat detector.
EST 882-2B Category : EST/EdwardsThis unit has an electronic horn rather than an electromechanical mechanism.