aregb

Thanks for all the good input. As everything else in life, it seems like a good compromise needs to be found 🙂

I understand the physics behind EMI, my thinking was that it would mostly be an issue close to the wires as that's where its going to be strongest. But while I have worked with systems where EMI can disturb the results, I have no experience with metal detectors, so I appreciate the input. As we dont live in the same country as the apartment (8 hours total flight time one way), we will have to purchase all the equipment beforehand, but getting the extra coil is not really going to break the bank, even if we find out it was unnecessary. Rather have more equipment than we need, than get there and end up missing something. From what I can gather, the X-Terra seems like a capable machine, would you say its worth reading up on alternatives?

For the X-Terra Pro, would the default search coil be sufficient, or would we gain anything from purchasing a different one?

Thanks for the tip. I believe that there is no electric wires in the floor itself, although probably plenty usage of reinforcing bars as it's fourth floor. Are electric wires in the walls going to cause EMI issues?

Many years ago, we found various gold chains hidden by my great grand grandfather in one of our apartments. My parents also remember various gold coins that were never accounted for, and the time has finally come to do a proper search in the old apartment. I have spent hours reading, but I find its quite hard to understand what kind of equipment we actually need. So basically, I need recommendations for gold detectors that covers these criteria: - Max search depth <10 inches, I believe the floor is around 5-7 inches deep. - Floor consists of some layers of wood, an air gap, and dirt. Under the dirt, there is concrete with no interest to us. - Needs to properly discriminate between ferrous and non-ferrous metals. - Except for iron nails and the gold coins were looking for, there is a very low chance of metals in the floor. We have no other interest in using the detector after this adventure, so we will probably sell it off for cheap. Ergo, no need for a super advanced deluxe detector if not strictly required. But we will happily pay what is necessary to avoid dismantling the whole floor.