Metal detector
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A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector typical
An early metal detector, in 1919, used to find un-exploded bombs in France after World War I
This 156-troy-ounce (4.9 kg) gold nugget, known as the Mojave Nugget, was found in 1977 by an individual prospector in the Southern California Desert using a metal detector.
Metal detectors at Berlin Schönefeld Airport
Polish mine detector
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The Mine detector Mark I was a metal detector for landmines developed during World War II. Initial work on the design had started in Poland but after the invasion of Poland by the Germans in 1939, and
Two Royal Engineers sappers demonstrating the use of a Polish mine detector in North Africa, August 1942
Polish mine detectors being assembled in Britain, 1943