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May 20, 2026 - 04:15 PM
Iron Check uses tone ID on DD search coils to distinguish iron from non-ferrous targets, so you can reject the worst hot rocks and ferrous trash audibly without digging every signal. Standard pulse induction machines respond to all metals and do not discriminate by conductivity, but the Axiom's Iron Check feature gives you a high tone on non-ferrous targets and a low tone on iron when you are running a DD coil. This helps in trash-heavy patches and old tailings where ferrous contamination would otherwise force you to dig every target. Mono coils do not support Iron Check, so you trade tone ID for maximum depth when you swap to a Mono coil.
