Grinnell TFX-912P

Just like the rest of my Grinnell equipment, this smoke detector is from Brigham Young University.

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STI SS-2000F

STI SS-2000F

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Can’t remember where exactly I put the key for this unit. It can still open with an allen wrench, but...
Gaylord NC-1357A

Gaylord NC-1357A

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This is a rebranded EST/Edwards 270-SPO for use in some sort of ventilator system.
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