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Target ID and ID Filtering
As explained before, target ID is a 2 digit number defining the target, produced by the
metal detector while the search coil goes over a target The number is shown on the
display as TARGET ID.
In some cases, the device may produce multiple IDs for the same target. This may result
from a couple of factors. Target orientation, depth, purity of the metal, corrosion,
mineralization level of the soil etc. Direction of the search coil swing may even cause the
device to generate multiple IDs.
In some cases the device may fail to provide any ID. The device needs to receive a strong
and a clear signal from the target in order to provide an ID. Therefore, it may not be able to
provide an ID for targets which are too deep or too small even if the device detects them.
Keep in mind that target IDs are “probable”, in other words, estimated values and it would
not be possible to know the properties of a buried object exactly until it is dug out.
IDs of non-ferrous metals such as copper, silver, aluminum and lead are high. Target ID
range of gold is wide and may fall within the same range of metal wastes such as iron, foil,
screw caps, and pull tabs. Therefore, if you are looking for gold targets, digging out some
trash metals is expected.
Some possible Target IDs and their ranges are indicated in the table below.
Above data may vary according to the field conditions. Coins searched throughout the
world are made of different metals and in different sizes in different geographical locations
and historical eras. Therefore, in order to learn the Target IDs of the coins in a specific
region, it is suggested to perform a test with the samples of such coins, if possible.
USA Modern Coins
US 1 cent (copper penny)
US 1 cent (zinc penny)
US 10 cent (dime)
US 5 cent (nickel)
US 25 cent (quarter)
79
65-66
79
30-31
85-86
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Non-ferrous Metals
Gold and gold coins
Silver and lead
Brass and copper
Aluminum
38-55
91-96
80-88
93-97
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Waste Metals
Iron, screws, nuts, nails
Foil
Pull-tabs
Bottle caps
00-10
14-16, 69-78
25-50
52-71
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Rocks and Mineralized Soils
Magnetized rocks
Iron rocks
Salty and alkali soils
00-02/97-99
00-10
06-08
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European Modern Coins
2 Euro Cent
10 Euro Cent
20 Euro Cent
50 Euro Cent
1 EURO
2 EURO
04
61
66
70
67
49
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