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Re: ULTRASONIC MOTION DETECTORS -Reply
From
: LUDWIK KOWALSKI <
KOWALSKIL@alpha.montclair.edu
>
Date
: Fri, 05 Dec 1997 20:20:00 -0400 (EDT)
We did put a layer of absorbing (?) material above the motion detector
(which is in a metallic box) and this did not help.
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