I found this one one of the outbuildings on my company's property.

 

I didn't get a chance to ask the property manager what it is.

 

It looks like some kind of laser target or something.

 

It is at a funny angle and there is no corresponding something aimed at it.

 

There appears to be no batteries or wiring, so whatever it is, it's 100% passive.

 

It does "point" at another high security company near us and it is in the alley between the two properties.  There is a 12 foot razor wire fence on their side though.   It looks like some kind of vehicle sensor to me and I think it's new.

 

Thoughts?

 

Definitely part of an alarm system. It is a mirror to re-aim a laser light to cover an area. We used to call them "Beams" in alarm lingo.

If it is pointing at nothing and nothing is pointing at it. It is simply a relic of an old alarm system my friend.

Definitely part of an alarm system. It is a mirror to re-aim a laser light to cover an area. We used to call them "Beams" in alarm lingo.

If it is pointing at nothing and nothing is pointing at it. It is simply a relic of an old alarm system my friend.

 

Figured as much.  Thanks.

I think its an Infra red deflector. I have a real antique one here somewhere. You can see the multiple facets if you look close. Most likely for an electric eye or something. Haven't seen one in decades.

 

 

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I think its an Infra red deflector. I have a real antique one here somewhere. You can see the multiple facets if you look close. Most likely for an electric eye or something. Haven't seen one in decades.

 

 

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If I run into the facilities manager tomorrow, I'll ask.   It's just in a weird place is all.

If I run into the facilities manager tomorrow, I'll ask. It's just in a weird place is all.

If it has multiple mirrors in it, its wide range. They might be using it for something else. Like ring a bell when beam is broken. One way or another, it may not be for a narrow beam.

 

Now ya got me wondering where mine is. Hmmm....[emoji848]

 

 

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Ah hah!

 

It's a Surveying Prism.

 

http://www.berntsen.com/Surveying/Survey-Prisms/Mini-Prisms/ctl/ViewProduct/mid/1600/itemID/1609

 

I did talk to the facilities manager and found out that when the thorium cleanup was occurring 8-10 years ago, they installed that on the building as a reference point.

Ah hah!

 

It's a Surveying Prism.

 

http://www.berntsen.com/Surveying/Survey-Prisms/Mini-Prisms/ctl/ViewProduct/mid/1600/itemID/1609

 

I did talk to the facilities manager and found out that when the thorium cleanup was occurring 8-10 years ago, they installed that on the building as a reference point.

Kewl. Guess it has multiple uses. Now you really got me wondering where mine is.

 

 

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