Simplex 4903-9238 Category : Simplex This unit has an electronic horn, as opposed to the speaker or electromechanical horn found in other rectangular Simplex notification appliances. Brand SimplexModel 4903-9238Manufacturer SimplexType Alarm (Horn/Strobe, 4-wire)
Wheelock 7002T-24 Category : WheelockEach 7002T-24 has a somewhat different pitch, so I’ve kept several that sound different from each other.
EST SIGA-278 Category : EST/EdwardsThis pull station used to be addressable, but I have since removed the addressable module.
Fenwal PSD-7155 Category : FenwalI am unsure if this smoke detector is actually made by Fenwal or just rebranded by them..
