Why do some metal detectors have complicated looking displays or controls?
Basically, there are two types of metal detectors – simple, turn-on-and-go or the more complicated, manual-adjustment units. The simpler detectors have a preset ground adjust or an automatic ground adjust. Internal circuitry eliminates the mineral effects of the ground. On the more complicated manual-adjustment units, the ground adjust is be set by the operator. If adjusted correctly, the detection depth can be increased a little. If not adjusted correctly, the results can be a very shallow detection depth. Both types of detector can be very effective.
