Instruction Manual - Indian Nations Detectors
Instruction Manual - Indian Nations Detectors
Instruction Manual - Indian Nations Detectors
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How Metal <strong>Detectors</strong> Work<br />
3<br />
Metal detectors create an electromagnetic<br />
(EM) field around the coil, which penetrates<br />
the ground. Because metal is conductive it<br />
causes a change in this field. The detector<br />
senses this change through the coil and<br />
sends a signal back to the control box,<br />
alerting the operator.<br />
Metal detectors can determine the size, shape<br />
and composition of metallic objects beneath<br />
the coil. Typically, the larger the object, the<br />
easier it is to detect.<br />
A metal detector’s EM operating frequencies<br />
are measured in kilohertz (kHz). Low<br />
frequency EM fields (e.g. 1.5kHz) penetrate<br />
the ground deeply, but sensitivity to smaller<br />
targets is low. High frequency EM fields (e.g.<br />
65kHz) have a shallower depth of penetration,<br />
but sensitivity to small targets is high.<br />
Safari’s multiple frequency operation provides<br />
the advantage of both; good depth and high<br />
sensitivity.<br />
Item Number: 4901 - 0070<br />
Revision: 1.1
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