Grinnell TFX-912P Category : Grinnell Just like the rest of my Grinnell equipment, this smoke detector is from Brigham Young University.
Wheelock AES-DL1-WS-24 Category : WheelockDepending on which set of inputs has power applied to it, the alarm will produce a different tone.
Simplex 2098-9806 Category : SimplexThis device is a permanent fixture in my Simplex 4004 wall system.
Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.