Wheelock 7002T-24 Category : Wheelock Each 7002T-24 has a somewhat different pitch, so I’ve kept several that sound different from each other. Brand WheelockModel 7002T-24Manufacturer WheelockType Alarm (Horn/Strobe)
Silent Knight SK-PHOTO Category : Silent KnightPersonally, I think that the Silent Knight logo on the head of this smoke is a bit ugly.
Space Age AV32+2DCD Category : Space Age ElectronicsThat is an electromechanical horn on the rear of the strobe plate.
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.
