Small Coils…

Does size matter, with coils…

In my opinion “yes” it does…

Here’s why my opinion is “Yes”… The size of any metal detector coil influences the detection depth and sensitivity of the metal detector itself because a metal detector coil works by emitting electromagnetic waves...

The smaller the coil the fewer electromagnetic waves are created… When these fields of electromagnetic waves, come into contact with a metal object, this metal object then produces its own eddy current within the metal object, which then generates its own electromagnetic waves, it is these waves from the metal objects that are registered by the metal detector…

Although a small coil is not as deep as a large coil, it does have a more concentrated electromagnetic field, making them more sensitive to small objects & tiny fragments, making these metal objects more easily detected…
When you chose to use a smaller coil, you gain a lightweight & an “easily” manoeuvrable coil, as these smaller coils can fit in small or tight places, & very easily fit in between the rows of stubble, that gets left behind when the crop has been harvested… For many, depth is everything, but although depth will not change too much, the size & shape of small coils are changing, & like the one, i have my eyes on at the moment, which is a ten by five, these narrow coils i hope will allow me to cover more ground, yet have the benefit of a smaller coil …