Metal detector systems

A metal detector is an electrical device that can determine the presence of minerals close to it. The metal detector is useful for finding objects containing minerals, or metal objects buried underground. The metal detector is often installed from a portable unit containing a sensor which can detect metals by scanning the ground or other objects. Where the sensor comes close to a piece of metal, the tone in the headphones will change, or a needle will move in the indicator. Often gives the device an indication of the distance or near the distance, where a stronger tone is sounded in the headphones when the distance of the metal object is close to the metal detector