Between every modern prospector and that little pocket of bullion, there’s a great metal detector.
. We researched numerous models from lots of different leading brands, looking for the best of the best. We took into account metal detectors we’d used, ones that peers had recommended, and ones that users spoke favorably of. Along the way, we did a deep dive into the technology behind our picks.
VLF detectors use a sensor coil and transmitter coil. The transmitter coil emits constant electromagnetic energy at a tuned frequency. When this energy encounters metal underground, it creates an eddy current in the metal that results in a phase shift of the reflected frequency. The sensor coil is then able to read this phase-shifted frequency pattern. VLF detectors make up the majority of metal detectors out there and tend to be the most versatile.
Coil size is an important factor in VLF detectors. While smaller coils will generally be more sensitive for gold, larger coils will allow you to scour more ground quickly. Luckily some detectors allow you to swap out coils. These enable you to hone in on a gold-rich area, then switch coils for a more accurate search.
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