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Technically speaking it can detect through anything, however the depth at which it can detect will be effected by various factors such as density, moisture and more importantly base metals present in the sand and soil layer.

One of the biggest factors is metal density and variety in the soil layer. An area rich in a variety of metals will require a detector with excellent discrimination in order to decipher specific target metals or there will be too much background metal to find a specific object.

Basically it comes down the quality of the detector, the depth it can penetrate and the level of discrimination that it can be set to that will allow it to pick out specific metal combinations. A poor quality detector will get confused and go off constantly if there is a high volume of metals in the soil composition and if it lacks the ability to tune out the "background" noise of those metals.

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10y ago
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13y ago

Well, most metals can be detected by a metal detector, but some metals which are a mixture of metals and other materials may not be detected.

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