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Scavenge for gold, coins, and other buried treasure with these metal detectors, including models from Garrett, Nokta, and Minelab.
Although the actual inventor of the hand-held metal detector is disputed, the hand-held metal detector was made in 1925 and was first patented by Dr. Gerhard Fisher in 1931. A metal detector had been invented some forty years earlier (1881) by Alexander Graham Bell for the sole purpose of locating a lead bullet in President James A. Garfield.
The most common type of metal detector is a hand-held metal detector or coil-based detectors using oval-shaped disks with built-in copper coils. The search coil works as sensing probe and must be moved over the ground to detect potential metal targets buried underground.
Non-linear Junction Detector (NLJD): A portable NLJD allows the operator to search voids and areas where they are unable to gain physical or visual access, in order to detect electronic components and determine if the area is free from IEDs. Laser IED Detection: Scientists are learning to adapt lasers to detect, or defeat, IEDs. [19]
Many of the nearly 4,000 reviewers love that despite being lightweight, they're well made for the price. "Light weight for easy handling and I'm older so it's easy to pick up," said one five-star ...