Can anyone identify this?


  #1  
Old 02-17-23, 08:05 AM
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Can anyone identify this?

HI all, thanks for having me! I just discovered and joined this forum.There seem to be a lot of interesting sub-forums here!

I am hoping you can help me identify something in our ceiling. A picture is below. It's about 1/2" tops in diameter, the center part is glass. It's in an entrance foyer, near a hanging light that illuminates the foyer. My thoughts are (1) it's too small for a light, plus it would serve no purpose next to the large hanging light; (2) no wall switch seems to 'activate' it, unless it's disconnected/burned out; (3) it's not part of the current security system, but is it possibly a sensor, or a camera lens of an old security/camera system?

What do you think it is? Thanks?



 
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Old 02-17-23, 08:28 AM
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It looks like a motion sensor. Possibly for a alarm system or to automatically turn the light on.
 
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Old 02-17-23, 09:13 AM
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For an old system no longer in use....maybe!
 
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Old 02-17-23, 11:57 AM
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Can you open it to see what is inside? Looks like that inner part can twist out.
 
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Old 02-17-23, 12:09 PM
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I could I guess, but I am not that handy and I would be afraid of not getting back together again.
 
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Old 02-17-23, 04:31 PM
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It is an old style motion sensor
The inner part turns because it's adjustable. It sees further where the openings are.

 
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Old 02-17-23, 04:45 PM
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Ah thank you @Pjmax! I have a current system motion sensor just inside the door of the foyer. This must be a remnant of an old system.
 
 

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