How does a metal detector work?

  • A metal detector will consist of a battery case and an electronic box on one end with a handle or brace for the arms of the operator. An insulated cable will extend from the box, and it will be covered around the shaft, and will be connected to a circular disk, known as the coil. The disk is sheltered by a plastic guard and it is connected to the shaft in an angle. This will allow the operator to hold the device parallel to the ground. The Dperator will sweep the coil slowly above the ground until he gets an electronic signal. This indicates that a metallic element is available beneath the part, swept by the coil.
  • The function of metal detectors is based upon the electromagnetic induction principles. These devices include one or more inductor coils, which are used to work together with metallic objects on the ground. The single-coil metal detector is a basic version, which is used in a genuine metal detector.
  • A metal detector is made up of an oscillator that produces an alternating current. This current will pass through a coil, generating an alternating magnetic field. If an electrically conductive metal part comes near the coil, Foucault currents or eddy currents will be made of the metal, and this will produce a magnetic field- The other coil, which is functioning as a magnetometer, is used to evaluate the magnetic field; the alteration in the magnetic field can be detected because of the metallic object.
  • All metal detectors are designed to detect a variety of metals that include silver, gold, iron, copper, nickel, brass, tin, aluminum, bronze, and lead. They will not detect nonmetal things, such as diamonds, gemstones, pearls, paper, bone, or stone figures. A metal detector has the skill to tell the disparity between dissimilar types of metals or alloys.

Uses of different types of metal detectors

  • Multipurpose metal detectors are used in flexible searching, seeking of a variety of metal objects casually. Coin and relic metal detectors are used in detecting small- to average-sized coins and historical objects in highly besieged areas.
  • Gold metal detectors are used in detecting little deposits of natural gold.
  • Underwater metal detectors are used in searching in underwater and on seashores.


Detecting of metallic objects is an admired hobby for those who consider looking for buried treasure, ranging from jewelry and coins left behind on beaches and in parks to chronological relics. Hobbyists habitually find serenity and peace by being out in nature, softly sweeping a metal detector backward and forward, with the steady hope that the ground may yield them something of material value to supplement the simple value of the action. Many experts involve in serious viewing for natural gold and other valuable metals and other metal objects with metal detectors. Both novices and experienced hunters alike require metal detectors that provide them with the features, which make their missions more successful, from a variety of working frequencies to pin down technology. Deciding the ways in which the user is likely to use the metal detector will assist greatly during the process of choosing and buying a metal detector or its accessories.