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.