So many of these high tech detectors have indicator gauges and/or digital displays that are supposed to tell you what is in the ground before you dig it up. What the sales brochures DON'T tell you is that in field tests the best of these were only accurate around 50% of the time! So don't make it a practice to put all your faith in those indicator gauges or digital displays, they are all too frequently WRONG. The state of that science (identifying what is buried without digging it up) is just not up to what the manufacturers claim. Think about that, you might have passed up on digging up a $20 gold piece, simply because your indicator said it was iron! This could occur even if the accuracy rate was up to 90%, which none of the currently available detectors has proven able to do.
Oroblanco