seriousdetecting.comAnswer
May 21, 2026 - 11:17 AM
Smaller coils generally trade maximum detection depth for tighter target separation in trashy areas where multiple signals overlap. The RC18C's 7-inch diameter generates a more focused electromagnetic field, which lets you isolate a coin sitting 2 inches from a pull tab or foil wad, scenarios where a larger coil gives a blended audio response. Many shallow targets in parks and schoolyards benefit from this focused detection pattern, where the depth tradeoff rarely costs you finds in urban environments. The compact footprint also improves maneuverability around playground equipment, fence lines, and park benches where larger coils drag or catch on obstacles. The concentric design delivers cleaner signals for better target identification in low-mineralization ground.
