A Metal Detector is an electronic tool used to detect metal in a zone. Useful for finding buried hidden metal objects. They often consist of a handheld unit with a sensor. The detector makes a changing tone in earphones if it detects a metal piece. Usually the device gives some indication of distance; the closer the metal is, the higher the tone in the earphone or the higher the needle goes if it usea a display.|
Depending on your needs you may find many types of detectors and one of the most used is the Gold detector, you may find hidden objects, another common type are stationary "walk through" metal detectors used for security screening at access points in prisons, courthouses, and airports to detect concealed metal weapons on a person's body or hidden anywhere.
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