seriousdetecting.comAnswer
May 21, 2026 - 10:37 AM
The pulse induction coil detects small gold jewelry in saltwater by ignoring the ground mineralization signal that masks low-conductivity targets on VLF detectors. Pulse induction measures target decay time rather than conductivity, so you hear ferrous versus non-ferrous response on items like gold rings, chains, and earrings even when they're buried in wet sand with high salt content. The 5.5-inch coil size maintains sensitivity on small targets compared to larger PI coils. We've recovered 10-karat gold bands and thin chains at 6-inch depths in Gulf surf zones where VLF units chatter constantly. The limitation is reduced target ID resolution, you dig more trash targets because PI circuitry doesn't discriminate as precisely as multi-frequency systems.
