Frensel material

wvhunter

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I was wondering where I could obtain frensel material.  Since a bear has destroyed the lens in my second RS PIR I now have two RS boards but no lens.  I have tried Frensel Tech ( http://www.frenseltech.com ) but have not heard back from them.  So I was wondering about other sources or if anyone had a lens laying around from a burnt out board.

(Edited by wvhunter at 1:18 pm on Aug. 13, 2001)
 



wvhunter

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Sorry, Richard I don't want to get rid of the boards, just locate some frensel material.  
 

Archilochus

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Hi wvh,
Suprised you never got a reply from Fresnel Tech... they were very prompt when I dealt with them.  Anyway, if you have no luck with them, you could try the round Fresnel lenses available from http://www.glolab.com  They are ~4.00US$ each I think - don't know how well they work though.

Archilochus
 

Steiner

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wvhunter,
The fresnel lens that Archilochus mentioned from Glolab works very well.  It is a very concentrated lens.  That is it will only pick up movement in a very narrow beam.  I have used them for several years with good luck.  
 

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