I've got a DeWalt surface planer that ALWAYS find any bits
of metal in any board run though it. Does that qualify as a
metal detector?? sigh. The 733 I have doesn't allow for
offsetting the blades to neutralize chipped blades.
I use a Garrett metal detector - the kind you see airport security using all
the time. I find them a lot better than that red one that you can get
through woodworking supply stores.
While I bought mine through Ebay, you can get them from any store dealing in
security equipment. I figured if I saved one set of knives on my 15 inch
Delta Planer, it was worth it. It's done that over and over again.
I had a lumber wizard. I found it to be very, very fussy to calibrate and
it wasn't all that sensitive. I returned it to the seller. I checked with a
security vendor and asked what they recommended for metal detection in
lumber. They pointed me toward a Garrett model (about $170).
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