Does Coil Size Really Matter in Metal Detecting?
Coil Depth: Does Size Really Matter in Metal Detecting?
One of the most important factors to consider when choosing a metal detector is the size of its search coil. The search coil, also known as the search head or loop, is the part of the metal detector that emits and receives signals from buried objects. It comes in different shapes and sizes depending on the type of metal detecting you want to do.
But does size really matter when it comes to coil depth? In this article, we will explore how coil size affects your ability to detect metal targets underground and what other factors may come into play.
Factors Affecting Coil Depth
Firstly, let’s clarify that coil depth refers to how deep a metal detector can detect an object beneath the ground surface. This depends on many factors such as soil type, mineralization levels, target size and shape, orientation and conductivity.
Soil Type – Different types of soil have varying degrees of mineralization which affects how well a signal can penetrate through it. Generally speaking, wet or highly mineralized soils tend to decrease your detection range while dry sandy soils allow for deeper penetration.
Target Size and Shape – Larger targets are easier to detect than smaller ones because they produce stronger signals. However, some small targets like gold nuggets have high conductivity which makes them easy to pick up even at depths beyond 10 inches.
Orientation – The way an object is positioned relative to your search coil can affect its detection range. Objects lying flat parallel with the ground are easier to detect than those standing upright perpendicularly.
Conductivity – Metallic objects with high conductivity like copper or silver produce stronger signals compared to low conductive metals like aluminum or brass. Therefore if you’re targeting gold jewelry which has lower conductivity than coins made from copper or silver then you might need a special kind of detector designed for finding gold nuggets rather than general-purpose detectors since these machines emit higher frequency waves ideal for detecting small gold nuggets.
Coil Size and Depth
Now let’s talk about how coil size affects your detection range. Generally speaking, larger coils can detect deeper targets than smaller ones because they cover a wider area with each sweep and produce stronger signals. However, this does not mean that you should always choose the largest coil available since bigger is not always better in all situations.
The ideal coil size depends on what kind of metal detecting you intend to do. For example, if you’re targeting objects buried deep down in highly mineralized soils then a large search coil would be beneficial as it can pick up weak signals from deep targets. On the other hand, if you’re searching for coins or relics in trashy areas where there are lots of iron nails and bottle caps scattered around then a smaller coil would be more suitable as it provides greater sensitivity to small targets while ignoring unwanted signals from trash metals.
Furthermore, larger coils tend to be heavier which means that they require more arm strength and may cause fatigue after prolonged use especially when swinging back and forth over large areas of land. This is why some detectorists prefer using smaller coils for their lightweight design making them ideal for short sessions at the beach or park.
Another factor worth noting when choosing your search coil is its shape. It comes in elliptical or round shapes depending on your preference although many experienced detectorists recommend using an elliptical shaped search head since they provide better coverage over uneven terrain and perform well in tight spaces such as between rocks or tree roots.
Conclusion
In conclusion, the size of your search coil plays an important role when it comes to how deep you can detect objects underground but it’s not the only factor that determines your success rate. Soil type, target size and orientation also come into play along with other factors such as conductivity levels which affect how well different types of metal respond to electromagnetic waves emitted by metal detectors.
Therefore before purchasing any metal detector make sure that you consider all these factors to ensure that it meets your specific needs and requirements. Always choose the right coil size for the job at hand, whether it’s a small or large coil, elliptical or round-shaped one depending on what kind of metal detecting you intend to do. Happy hunting!