Top 7 Features for a Metal Detector

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Metal detectors are extremely useful for detecting metal objects buried underground or even hidden within other objects. While metal detectors have some important military purposes, many people enjoy using them as a hobby to find coins and other buried "treasures" at the park, beach, or other locations. Understanding the basic technology and features of a metal detector is important for anyone planning to purchase one. Once consumers understand how a metal detector works, they can choose the detector that is best for their needs.
1 Coil Technology
Coil Technology

There are three types of coil technology commonly used in metal detectors: double D coils, concentric coils, and elliptical coils. Double D coils are two D-shaped coils placed back to back. This type of coil gives metal detectors a wider sweep, and heavy ground mineralisation does not seriously affect its performance. This particular coil does not read as deep as others do, but it is great for accurately pinpointing metals. Made with an inner and outer circle, concentric coils are quite common. They tend to be somewhat noisy in areas of highly mineralised soil. Finally, elliptical coils are similar to concentric coils but feature an oval shape. This coil has more ground coverage, but pinpointing an object is a bit more difficult.


2 Coil Size
Coil Size

Metal detector coils come in multiple sizes. A good all-purpose coil usually measures between 20 and 22 cm in diameter. Smaller coils tend to be more precise and are an excellent choice if the user is looking for a specific object among many trash objects. Larger coils are better for areas of low mineralisation with few trash objects. In addition, larger coils cover more ground and read a little deeper than smaller coils.


3 Target Identification

Detectors with a target identification feature recognise certain types of metals or coins. As the user passes over the item, the detector identifies the item based on the size of the target and its conductivity. While this is helpful in many settings, the target identification reading is not always accurate, as conductivity of an item varies depending on the depth of its location. In addition, unusual items are not included in the list of possible targets the user might encounter.


4 Tone ID
Tone ID

Some detectors come with a feature called tone ID. This works in the same way as target identification. Instead of a visual display, however, tone ID metal detectors emit different audio tones for different target conductivities. For instance, a detector with tone ID might emit low-pitched sounds for iron, foil, or nickel targets, while high-pitched tones may indicate silver dollars, dimes, quarters, and copper pennies. Tone ID has the same limitations that target identification has, but many users still find the feature quite helpful.


5 Low Battery Indicator
Low Battery Indicator

Many metal detectors come with a low battery indicator. This helpful feature lets users know when they are about to run out of battery. A small light may come on or the words "low battery" may appear on the detector's display screen.


6 Multiple Modes
Multiple Modes

Discriminating metal detectors may come with several modes. Discrimination mode uses filtering methods to identify certain metals and separate them from trash targets. In discrimination mode, sensitivity and depth readings may be affected. When set to all-metal mode, the detector does not filter out any metals. Mixed mode is available on some metal detectors, and it is somewhat similar to tone ID. A high-pitched chirp identifies a good target. A low-pitched noise identifies junk targets. A third, fainter noise identifies targets buried too deep to recognise. Furthermore, pinpoint mode provides a wide audio target response on the first sweep of the coil, and it thereafter narrows its response to pinpoint the target with each sweep that follows.


7 Operating Frequency

The kinds of targets the user is looking for determines what operating frequency they need for hunting. Generally speaking, low-frequency detectors have better depth detection and are more sensitive to copper and silver. High-frequency detectors are best for detecting smaller metals and natural gold. Since they are more sensitive to smaller metals, they are difficult to use in high trash areas, since they have difficulties discriminating nonferrous materials. Most gold metal detectors work at high operating frequencies.


How to Buy Metal Detectors on eBay

Buying a metal detector or other supplies, such as metal detecting headphones, is easy on eBay. Simply type the product you are looking for into the search bar and many results appear instantly. Consumers do well to look for a good deal from a top-rated seller who is sure to put customer service first when executing a sale. With thousands of great deals available for new and used metal detectors on eBay, consumers are sure to find what they are looking for.
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