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May 20, 2026 - 01:11 PM
A concentric coil creates a focused electromagnetic field pattern beneath the coil center, delivering peak sensitivity to small targets directly under the coil. DD coils provide better ground coverage and superior ground-balance stability in highly mineralized soils. The GR26C concentric configuration excels in low-mineralized ground where its focused field delivers better small-nugget sensitivity and cleaner target signals on shallow finds, but it becomes more susceptible to ground mineralization effects than DD coils in hot ground. For a deeper explanation of coil technologies, see our detector technology guide.
