Jump to content
Security Installer Community

Radiovisor BA500T help please!

Recommended Posts

Hi All, 

I’m new here and a fraud as I don’t install security alarms but came across your forum when searching Radiovisor. I’ve just picked up from a house clearance sale two intriguing wall mounted Radiovisor devices that seem to use infrared and I wanted to try and find out their original application. I will try and attach pictures but they are both around 6” square and 4” deep, one having a single lens and one having twin lenses. They are badged “Radiovisor” and inside have the type BA500T. They appear to be from the 1930-40 era but bear no dates. Can anyone give me any clues as to where they would have been used and what for as I’m intrigued by them? They’re going on the wall in the utility room, come what may, but I’d like to find out about them if I possibly can! 
Thanks for any help you can give!


Paul King, KentIMG_6912.thumb.jpeg.a20c9c9ca1bf14efa260062d9ba40ccf.jpegIMG_6911.thumb.jpeg.b9cb5930bb6e85a0c3b5616bfd6c47f7.jpeg

Link to comment
Share on other sites

Thanks guys, those are helpful comments and confirm my thoughts although it’s useful to hear how they might have been used. When cleaning them yesterday I noticed that the single lense was red but the twin lenses are black, similar to welding goggles. I presume that the red would be the transmitter as there is a diode behind the internal curved lense? 

Link to comment
Share on other sites

Posted (edited)
11 hours ago, MrHappy said:


Looks 1970s to me ?

You looking in mirror on a good day? 😁 

Edited by al-yeti
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.