JoeSchmew
731
8
1
Aug 6, 2023 6:16 AM
JoeSchmew
731
8
1
abraxasfury
Looks like a buttfor
abeansits
Some sort of alarm switch box.
JoeSchmew
What do you suppose the two lens things are for?
ChanceVLuck
Alarm guy here. It's one side of a set of ancient (70's?) photo electric beams. There is or once was a receiving unit on the other side. It may be missing since it could've been passive meaning no electrical connections, just mirrors.
ChanceVLuck
Newer smaller verison. https://www.amazon.com/Retro-Reflective-Photoelectric-12-240VDC-24-240VAC-Proximity/dp/B084ZT442X
JoeSchmew
Hmm, interesting. What are the applications?
ChanceVLuck
You probably own one an just don't know it in the form of the beam across the bottom of your garage door. It's to create an invisible line that when crossed, creates an action; trip an alarm horn, open a gate, close a gate, turn on lights etc. it is more precise in its area of coverage than a motion detector but also easier to defeat by climbing over or under. Think of it as an invisible fence.