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From: gboyd@atlantis.actrix.gen.nz (Garry Boyd)
Subject: Re: magnetic sensors
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Date: Tue, 4 Jul 1995 10:59:45 GMT
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From memory the part # is UGN 3503, a 3 terminal device that you give 
++12V or so, the centre(??) lead is biased to half supply,,, increases 
with a north poles approach, decreases with a south pole. neat device, 
works over a couple to six inches.
