Metal Detectors

  • Metal Detectors are available in a wide variety of designs.  However, they all operate using the same principle. 
  • A metal detector is an electronic device that consists of a large coil of wire, called a search coil (a search coil is the round end of the metal detector) and some special electronics to allow us to ‘hear’ the presence of buried metal by a change in the note from the metal detector’s speaker.
  • Metal detectors are also not effective for screening baggage and handbags because there are usually a large number of different metallic objects and materials located in or as part of the composition of these carried items that would cause the equipment to alarm.
  • Metal detectors are also used to detect foreign bodies in food, and in the construction industry to detect steel reinforcing bars in concrete and pipes and wires buried in walls and floors.
  • Metal detectors are widely used in archaeology with the first recorded use by military historian Don Rickey in 1958 who used one to detect the firing lines at Little Big Horn.
  • Metal Detectors are primarily used by hobbyists who are looking to find a wide range of metals including, relics, artefact, coins, jewelry including silver and gold.
  • Metal detectors are more sensitive to some metals when they are facing a one way, and less sensitive when those same metals are facing another way.
  • A metal detector is an electronic device that is influenced by the external presence of a metal object to vary its electrical characteristics.
  • Metal detectors are a convenient screening tool, since a person has only to walk through an AMD at a normal walking speed range.
  • Metal detectors are useful for finding metal inclusions hidden within objects, or metal objects buried underground.