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May 21, 2026 - 12:50 PM
The SP22's DD (Double-D) coil design produces a blade-shaped detection field that isolates targets more precisely in high-trash environments compared to the cone-shaped field of a concentric coil. When you sweep over multiple targets close together, the DD field detects each one individually rather than blending their signals into a single confusing tone, which is critical in urban parks or old homesteads with heavy iron contamination. DD coils also perform better in mineralized soil and saltwater because the overlapping transmit and receive windings cancel more ground noise, letting you run higher sensitivity without false signals. Explore metal detector search coils: dd, concentric, monoloop & sef upgrades to compare coil geometries across different hunting scenarios.
