What is the range of a metal detector?

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Slice asked:

Objective is to find a set of lost keys in two feet tall grass and weeds. Does a metal detector have enough range – reading seems to indicate that they only work within 6 inches or so. Anyone know of any another electronic device could be used to expediate such a search?

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This entry was posted on Sunday, December 6th, 2009 at 12:36 am and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

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2 Responses to “What is the range of a metal detector?”

  1. Anonymous Says:
    December 6th, 2009 at 1:28 am

    On quick investigation 10 feet, with a 12-15 inch coil

    Man, but look at the size of that nugget!!!!!!!!!!

    I’m dropping this Physics fiasco, and going prospecting. Yee haw!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  2. Anonymous Says:
    December 9th, 2009 at 12:33 am

    Metal detectors have to be quite close to the object you are looking for – at least, those available commercially do. I believe the miltary have some highly sophisticated devices, but they have highly sophisticated price tags as well.
    You could always drag a magnet through the grass – if the magnet is strong enough it should pick up the keys.