Metal detectors are used to find hidden or lost metal objects in the ground, walls or other objects.
Metal detectors have a coil (a wire in series) that creates a magnetic field around its seeker disk when electricity flows through the coil.
When the metal object is placed in the magnetic field, the intensity of the magnetic field will change and the metal detector will notice the presence of metal around its disc with these changes and will reveal and inform about it.
The greater the intensity of the magnetic field produced by the device, the greater the depth of metal detection. The depth of exploration by the metal detector changes according to the size, shape and material of the metal.
So if you shake the device around a metal object, the moving magnetic field will move the atoms inside the metal and affect the way the electrons (small particles that go around the nuclei of atoms) move. In other words, the metal detector creates some kind of electrical activity inside the metal.
What parts does the metal detector consist of ?
Conventional metal detectors are composed of relatively common components, which include:
Balance handle: It is used to maintain the balance of the device when moving it forward and backward.
Control box: This box contains circuits and components, batteries, speakers and microprocessors. which controls the entire system.
Rod: Connects the control box to the coil so you can operate the system without bending.
Loupe: A device used to magnify the view of small objects or the clarity of objects.
Handle: It is a rod on which the components of the metal detector are placed on the handle, and the standard handle must be light in weight and high in strength.
Antenna: It is a part that senses the presence of metal.
Also, many devices have a phone connected to the speaker system and a small screen.
How far can metal detectors detect ?
This issue depends on various factors such as dimensions, shape, type of metal, life of objects, etc.
It should be noted that it is much easier to find larger metals than smaller ones, and objects that have been buried for a long time are most likely oxidized, and as a result, they are difficult to find with metal detectors.
