Maybe you’ve ever seen a person walking with something out in the fields that resembles a golf club. Then it’s probably a metal detector you use. A metal detector is designed to look for metals in the soil, in other objects or in a specific location. Today, when terrorism is a recurring concern, metal detectors are also used in football stadiums or concert venues or on the airport plastics.
This way you can check if someone might be carrying a weapon or other dangerous object with them. In most contexts, however, a metal detector is used to identify metals and minerals outdoors or in dumps and the like. In the military, metal detectors in search of mines are both practical and frequent.
Anyone can buy a metal detector but first it is important to understand how they work. The first thing you should know is that they come with different abilities to identify metals in the soil. The more expensive and advanced models have the ability to search for metals at a deeper level, while they can more easily only look for objects at the surface or near by. Some detectors also make it possible to adjust the sensitivity based on the location you are at and what you are looking for. This characteristic is mainly one of the expensive variants. They are usually used in mining, etc.
For mining, the discernment of metals is also important. The best metal detectors can detect different metals in the rock and thus tell you where to dig for what. This is also called calibration and the higher the calibration and discernment of a metal detector, the less often it emits false signals about which metal has been found.
Last but not least, in some cases you want a metal detector that can identify the depth where the metal is so that you know exactly where to dig and how much. During mining, this function is very good, as you prefer to gain time and not encounter boring surprises. The depth indicator also reveals what kind of mining you should use and what digging method.
Types of metal detectors
Many metal detectors look like a shovel or a kind of vacuum cleaner but there are also small models with a display that tell you what’s below your feet. They do not therefore have to be unwieldy and heavy to move, but can also be smaller and easy to take with them.
Prices, of course, also vary markedly. Today you can buy a metal detector for about 600 SEK if you want a cheaper variant, but you can also come up in prices that between 40 000-50 000 SEK. In this metal detector best in test, it is probably mostly talk of private use, but we’ll still bring an expensive model for those who are interested.
How is a metal detector used?
Metal detectors have a coil that generates magnetic fields when power comes through it. Nearby are additional coils that react to the magnetic field. And when a metallic object enters this magnetic field, this causes a disturbance on this much-vaunted magnetic field that makes a rash by measuring the induction. The metal detector also has a radio transmitter and a radio receiver.
The coil, which is the important manie in this context, is located on a standard metal detector, at the bottom of the shaft and is connected to the box where the transmitters are located. When the detector is put on, a signal is continuously sent from the transmitter and the coil. The coil, which then begins to function as an antenna, sends back a value that is read in the receiver.
It is when the value changes that the metal detector gives off a beeping or honking sound and then you can begin to sense that something is going on. The honking can be heard in different ways, depending on the metal involved. Depending on the transmitter, noise may also occur.
Keep in mind, however, that some soil with mineral matter can affect the detector and give false signals to the owner who thinks it’s time to start digging. A metal detector must be constantly in motion, as the coil quickly gets used to the metal and then stops howling if the detector is kept still, leading the owner to believe that it was a false alarm when this was not the case.
So as I said, you have to read on before you start using a metal detector. In this best in test as follows, however, we will describe some models a little more closely.
Permission to own a metal detector
In Sweden you have to have a permit to buy a metal detector. These permits are free of charge and are issued to the county administrative boards. It is easier if you tell them that you have a genuine interest in archaeology or similar. They usually take that as a positive trait. But you have to state the areas you want to look at, because some areas are protected by this particular type of leisure activity, such as heritage protected areas.
Metal detector best in test
Although a permit is needed, this is usually not very complicated to get. Some areas such as beaches are easy to search and do not require major issues. Metal detectors can be purchased both online and in stores and we have selected three models in different price ranges and with various properties that will guide you through your metal detector purchase.
1. Black & Decker BDS303 BDS303-XJ
First out in this metal detector best in test, this cheaper model comes from Black & Decker that looks like a hand vacuum cleaner. It searches for both wood and metal and is good to have on hand in the home when looking for wooden studs before drilling.
The device is called 3-in-1 and also serves as a simple metal detector. It searches objects down to 1 meter depth and also warns of live wires. Thus an excellent helper when renovating old houses. At the same time, it has a display that warns of hidden objects such as metal.
This is not a directly advanced device but works as a no-use to unknown buildings or places where you want more information. At the same time, it is easy and easy to hold and does not take up much space. May not be suitable for those searching for deeply hidden objects in difficult terrain, but a good instrument to clarify the base of the area.
The disadvantage is that it keeps the calibration short and that the display is a bit difficult to interpret.
2. Metal Detector C.Scope CS1MX
In the mid-price range of this metal detector best in test, we have this model from Scope. It is very light and flexible to use and can look up silver, gold and other metals in no time.
The small size makes it easy to take with you and is used in difficult terrain. The detector has 3 waterproof coils and a fully adjustable differentiation, to distinguish the metals. Sensitivity is also fully regulated.
These adjustments, which are very practical in the use of this device, make it possible to search for metals at many different depths.
Unfortunately, you have to order the battery separately, which we think is a bit stupid. Another disadvantage is that the type of transmitter has self-resonance, which causes a certain noise sometimes. However, the built-in speaker, the ergonomic design and the advantage of being able to set the depth and sensitivity as you like, make this our favorite in this best in test.
3. Garrett Metal Detector AT Pro International
This metal detector is common in advanced and professional contexts but can also be purchased for private use. It is in the higher price range in our best in test. The detector has a search depth of 180 cm and is waterproof down to 3 meters depth.
It can be set to different sensitivity levels, namely 8 pieces, making it a good metal detector.
Since it has a high iron filtration, it can search for plastics where there is a lot of other scrap that is screened off by the transmitter. Accessories such as search pads and headphones are included as well as a clarifying user manual.
A big plus to all the adjustments you can make to both transmitter, sound mode and shaft as well as Pro Audio Mode that identifies the metal and depth at the same time.
This is a very good detector that detects many different metals at a relatively deep level. Are you serious with your search and want a detector that really does the job, you should invest in this. It is a bit expensive for an ordinary layman, but this is, of course, a matter of taste and a matter of priority.
After testing all three metal detectors, we have a clear favorite, which is C. Scopes model. It worked very well and is ideal for both private use and professional commitments. If you are going to do really difficult searches, you probably need a more stable and larger as well as more advanced metal detector, but this does the job very efficiently.
It is comfortable and pleasant to use and you can really set it according to the metals and the search depth you please. The waterproof coil allows you to search the watercourses as well as when it rains outside, without having to worry about whether it will break or not. However, you can be prepared for a little noise sometimes and this is nothing you will find with Garret’s metal detector.
It’s all about how deep you want to go and what terrains you want to search on and whether you use a metal detector at work or not. Keep in mind that all metal detectors require a permit and an explanation of where you want to search. You must not disturb heritage sites or dig up objects in historical sites intended for archaeologists.