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.


A metal detecting case study for newbie The metal detector is not new to you, we all have seen and experienced them in life at one time or the other. Metal detectors come in various shapes and forms and used at different occasions for different purposes.

To look out for coins in your neighborhood park to even using a gold detector in mines in African lands or even sometimes to clear mines in south East Asian lands. From bigger sizes to small handy sizes metal detectors are available in many sizes to be even used in daily lives.

Metal detectors are used as Airports for security check, at shopping malls for security checks and some are even installed at entrance and exit doors of any shop to check for any theft and loss to the retailer.

Metal Detectors are also used for industrial and marine applications. In marine, they are used for under water search and recovery; they can also locate underground cables or any kind of leaks.

Their inbuilt sensor helps to detect even the metal which may be wrapped up or embedded deep within an object. Built with smart technology these metal detectors which are used for detecting gold underground have excellent ground balancing and are too sensitive to detect gold even at greater depth.

The treasure detectors are good to differentiate between treasure and trash and so are the counter mines detectors, strong and sturdy to he used again and again in harsh environment.

The Metal Detectors can either have a sound giving effect to tell that a metal has been detected or they may have a meter that shows that the needle has moved.


In Industrial Setup metal detectors are used in pharmaceutical, food, beverage, textile, garment, plastics, chemicals and packaging industries. They help in detecting if the food is contaminated with any metal in it. in Garment industry metal detectors are used even while manufacturing and packaging if by mistake any needle or any metal is left in the cloth.


A Metal Detector generally has important 4 parts:


Stabilizer: To keep it composed while its moved back and forth. Control box - The processor, battery and speaker all stored here. Shaft - To set the instrument at a comfort level as per your height and it also connects the control box and the coil to complete the circuitry. Search coil This is the most important part as this is the one which actually searches the metal. A Metal detector works with the help of a transmitter coil and a receiver coil, through transmitter coil the electric current runs through and forth and the receiver coil senses and sends sensations by amplifying the frequency indicating that a metal has been detected.

Thus, there are various technologies available in the market to ensemble a metal detector depending upon the usage of the metal detector it is composed and used in various areas of life be it personal or professional. Hence before buying any of the metal detectors as an individual or as a corporate, research well and then make a decision.

Metal Detecting is an exciting hobby that offers the opportunity to discover buried treasures. Using ground search metal detectors to find coins buried underground can be quite profitable. Coins from decades or even centuries ago could be hidden under just a few inches of soil. It is very popular to use a metal detector at a beach or park, where visitors may have dropped jewelry while playing, or on battlefields from centuries past, where you may find war relics, buttons, and a whole range of other artifacts.

You might even be able to find a valuable treasure in your own backyard.

If you want to participate in this hobby, the first step is buying a metal detector. Sophisticated metal detectors come in styles designed for hobby, prospecting, or security use. Every model currently on the market is much more powerful than the metal detectors of years past. With long lists of features and a wide variety of styles, buying a metal detector in today's market is no easy task. Choosing the most reliable metal detector is crucial for success in metal detecting. An LCD screen can help you determine whether your find is worth digging up, or just rusty scrap metal. In fact, some of the more sophisticated models will even display the possible object, so that you can tell if you've found a watch or an antique coin even before you start digging.

It helps if you know what type of objects you want to find, although the highest quality metal detectors have the depth or sensitivity adjusters so that you can use the metal detector for a wide range of applications. If you plan to use your detector in shallow water, you may want a waterproof model, although most metal detectors can be used with water-resistant coils for everyday metal detecting. While many are good all-around metal detectors, others are designed specifically for gold, coins, underwater searching, or other uses, and use a specific frequency tailored to finding those types of objects.

Both size and weight are important considerations when purchasing a metal detector. The size of the search coil on the end of the detector will determine how much ground you're able to cover in a single pass.

The overall weight of the device is also important because it affects how far and how long you can carry the metal detector comfortably.

Garrett Metal Detectors are one of the most popular brands, known for the simplicity of operation and accuracy. This detector can be used to find anything from war relics to coins and even the tiniest piece of jewelry buried underground. With today's newest metal detecting technologies, it is even possible to search previously searched areas to find metal objects that were missed with older metal detectors. There could still be something good left behind- Even a novice has the potential to find enough relics, rare coins, or lost jewelry to recover the cost of the metal detector in no time.

There are many sites that sell metal detectors at great competitive prices. You can also get them at your local store, but might not have as many choices compared to an online store. When deciding on a new metal detector, just make sure you are getting the one you need or want for the correct price.