How Does a Metal Detector Work?

Metal detectors have a wide variety of uses apart from the most common one which is security screening at most entrances. It is actually true that most of the people out there do not have the slightest idea how the metal detector actually works.

Other than giving an elaborate explanation on the workings of a metal detector, the article also points out the main parts of a typical metal detector and this information is particularly useful if you intend to buy one in the near future. We shall start with the components of a metal detector then finalize with how it works.

Components of a Metal Detector

A typical metal detector consists of four main parts namely:

  • Shaft
  • Stabilizer
  • Control box
  • Antenna

The shaft is like the housing of the metal detector as it acts as the structure onto which the rest of the components are attached. This component is adjustable so that you can fine-tune it to the appropriate height. The stabilizer is another one of the main attachments that is used to ensure the metal detector is comfortable when you move with it around. The control box is the central processing unit of the metal detector and it contains the microprocessor, the controls, the speakers, and the battery. As for the antenna, it houses the coil, which plays the role of doing the actual metal detection.

The knowledge of these components and their individual functions is essential because you get to know what you need to look out for should you want to buy a metal detector in the future. Nevertheless, you still need to know the actual workings of the metal detector to be in a much better position when you are the one making the buying decision.

How it actually works?

Even though a metal detector appears to be a complex piece of equipment, you will be surprised to learn that the principles of its workings are pretty straightforward. If you move around the metal detector, it will produce a beep when it detects a piece of metal buried underneath the surface.

The main principle behind a metal detector detecting a piece of metal is the transmission of a magnetic field. Now electric current runs through the coil in the antenna and when a metal is detected, the coil transmits a magnetic field to the search head which is located in the antenna and acts as a receiver. Once the coil in the search head receives the magnetic field from the detected metal, it is relayed to the control box through a cable attached in the shaft. Well, before this magnetic field is transmitted to the receiving coil, it is first amplified, which means by the time it is arriving in the control box, it is large enough thus causing the unit to send the audio tone to the speaker. This is the sound that you actually hear when the metal detector comes across a piece of metal buried beneath the ground.

A typical metal detector will only go as far as detecting the presence of metal beneath the surface. However, technologically advanced metal detectors have the ability to provide you with additional details of the detected metal. This means that you can actually determine the specific type of metal detected.

  • Follow each workout segment to know the right resistance to use on the machine
  • Make sure you have eaten something before the training and also after the training. This is to fuel the body while on the machine.
  • If you feel weak or tired while on the cross trainer, you are required to get off the machine.
  • For effective results, perform the workouts three times a week with one day rest interval.
  • Increase the minutes each time you work out.
  • After the exercise, stretch the muscles to cool off

We have established that even though the metal detector appears to be a complex piece of equipment, its workings are pretty straightforward. Knowing how the metal detector works will help you in choosing the one that will suit your needs such as searching for gold at the beech. In addition to that, this knowledge also enables you to obtain the best results out of the metal detecting task.

About the Author Harry Thompson

Gaining a BSc Honours in building/ property maintenance at the University of Portsmouth Harry went into the field of renovating properties. Along the journey, he has developed a wide variety of home & garden DIY skills such as installing new kitchens and landscaping gardens.