System Sensor 5601P This is a 135F rate of rise and fixed temp heat detector. Brand System SensorModel 5601PManufacturer System SensorType Heat Detector
Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.
Space Age AV32 Category : Space Age ElectronicsI have no idea why there is no fire lettering on this unit
H. R. Kirkland Indicator Category : OtherThis unit bears no model number, only the brand “H. R. Kirkland,” a company that still manufactures fire alarm system...
