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Re: ULTRASONIC MOTION DETECTORS -Reply



At 20:20 12/5/97 -0400, you wrote:
We did put a layer of absorbing (?) material above the motion detector
(which is in a metallic box) and this did not help.


To cope with absorbing a reflected beam transmitting in a 15 degrees cone
at about 20 feet, I suppose more than 5 feet sq of absorbant is required.
brian whatcott <inet@intellisys.net>
Altus OK