3 Main Kinds of Metal Detectors

There are three kinds of metal detectors to choose from. It is crucial to recognize the variety prior to buying one. You have to choose the model that best fits your expertise level, your budget, and the kind of pursuit you want to take up; whether you want to go searching for relics or go for the gold.

Once you pick a metal detector that contains all of the features you need, you will be more successful in your endeavors. The following are the types of metal detectors you need to know.

Beat-Frequency Oscillation

One of the most common metal detectors, this is the type that is mostly used in electronics stores. It is capable of looking for items situated approximately 2 feet underground. Each and every metal detector makes use of twisted copper rolled all over a ring that is made from steel or iron.

The metal detectors feature one big ring that is fastened to its base. Furthermore, it has another smaller ring fastened a bit higher. These coils are both linked to the oscillators that can produce a frequency.

The coils work at a differing frequency, though. This particular disparity is the factor that the metal detector perceives and transmits to the speakers. The speakers look like a head ornament and they generate a noticeable, constant hum that can be perceived by the user employing the detector.

As soon as the base coil passes over a metallic item, the electromagnetics interaction brings about an intrusion in the transmission of frequency. This intrusion is then employed as evidence of the presence of a metallic item.

VLF (Very Low Frequency)

This kind of detector is one of the most widely-used since it has a variety of uses due in part to technological advancements. It has 2 spherical wire coils which are called a transmitter and receiver. The transmitter is employed to release a magnetic field with low frequency into the ground that is utilized for hunting treasures.

The receiver, meanwhile, is employed for its ability to pick up magnetic signals from an item that is located under the ground. As soon as the signal occurs, a sound will be audible.

In addition, this kind of detector has an electric circuit called a tuner, and its purpose is to send signals to the receiver of the device. For gold and silver prospecting, users can filter out signals that come from steel, iron, and aluminum so they can focus more on their goal item.

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PI (Pulse Induction)

The pulse induction kind is specifically employed to look deep into the surface for relics, gold, and treasure. The larger-sized models are employed at checkpoints that need security for firearm/weapon detection. A single-coil is employed for this purpose and it transmits a magnetic field into the ground.

This kind of detector changes models to assist users in listening for the signal that was found and can distinguish between accidental external signals from its environment, or sent signals. Furthermore, this type of detector is pricier compared to the others.


The industrial kind is employed mainly for security purposes. They cannot be used for treasure and gold hunting. One of the most widely-used examples of an industrial detector is the doorframe detector. This type is normally found in a majority of well-secured buildings and airports.

It operates by way of standard electromagnetism principles. It is also very efficient when it comes to preventing criminals from going inside buildings with hidden weapons.

More About Gold and Relic Hunting Detectors

The gold metal detector is typically built with only one purpose in mind—to search for gold.

The common gold metal detector makes use of VLF, mentioned earlier, to distinguish gold buried under the ground, while it can be difficult to only detect gold due to lack of keeping away different kinds of interference. Patience and Practice are required.

The search for relics by means of metal detectors can range from antiquated coins, down to artifacts from the Civil War and other historical events. This is a pursuit that is most popular in the United States, Australia, and Europe.

For relic metal detecting, one of the most crucial factors that seekers have to consider is the kind of ground they will be searching on. Soil or ground with hefty mineralization may require a metal detector that has ground balance control so users can strain out intrusions from minerals, yet still possess enough sensitivity for a good selection of relics.

The AT Pro is a good relic machine. See our review [HERE]

The frequency of the detector is important; since plenty of relics are built from brass, iron, and steel material, and you will have to get used to the detector that you have chosen. This will only happen if you put the time in and learn the different programs and features of your machine. Lastly, a model with pinpointing control is also a must in order to allow users to zoom in on an item more quickly.

We also recommend a hand held pinpointer for quicker extraction

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