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Target Conductivity
Target Conductivity refers to the reactance of the target and depends not only on
the metal alloy but also the shape, size and thickness. Small gold jewelry (earrings,
thin rings, thin chains) is usually low-conductive and large gold jewelry (heavy rings,
thick chains) usually has a higher conductivity. But jewelry occupies a continuum of
conductivities. Unlike many other PI detectors, the Impulse AQ Limited can detect
most gold targets within the category of low conductors.
Coins can also occupy a continuum of conductivities, but many (especially those
with high silver content) fall in the high range, whereby some smaller bronze and
cupro-nickel coins (like the US nickel) and thin coins like hammered silvers fall in the
low range.
Finally, trash will fall across the conductivity spectrum. Pieces of aluminum foil are
among the lowest conductors. Pull tabs, screw caps and bottle caps are in the middle
and iron tends to be on the high side.
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