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A Metal detector is a portable electronic device that penetrates the ground magnetically in order to find traces of metal. This metal could either be discarded pieces of aluminum or valuable coins, jewelry, or other buried treasures. Part of the appeal of using the device is this unknown factor, keeping amateurs and professionals on a constant scan for new sources of metal and more promising locations. These tools can usually penetrate sand, soil, wood, and other non-metallic substances, making most areas fair game for treasure hunters. A basic metal detector consists of an electronic box and battery case on one end, with a brace or handle for the operator's arm. An insulated wire wraps around a telescoping shaft and into a round plastic disk called the coil. This disk comes off the shaft at an angle, which allows it to be held parallel to the ground. The operator straps on or grips the electronic box and turns on the power. The idea is to slowly sweep the coil end over the ground until an electronic signal is heard. This lets the user know that some metallic element is buried directly beneath the area swept by the coil.
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