Fisher F19

The F19 runs at 19 kHz, which is high enough to respond to small gold, thin hammered coins and other low-conductivity targets that lower-frequency machines pass over. That makes it a strong choice for relic hunting and for prospectors working ground that is not severely mineralized. Adjustable settings, fast recovery and a light build let you work trashy sites methodically. A specialist edge in a machine that still handles ordinary coin hunting well.