What is a metal detector? A metal detector is an electronic instrument that detects the presence of ferrous materials (such as iron or aluminum) by using a radio frequency receiver, similar to that used in radar or sonar. Usually, these are used to detect buried metallic objects such as bombs and mines
Metal detectors are available in both handheld and vehicle-mounted varieties. They can be used for detecting all types of metals, including ferrous and non-ferrous items such as gold, silver, bronze and copper. Handheld units usually have a detection depth of about 10 inches (25 cm). Vehicle-mounted models can detect objects from up to 100 feet (30 m) away.
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