Scanning metal detector or image scanner or any type of ground penetrating radar must have a gold and silver test and all types of metals in depth to prove that the frequency radar circuit has the VDI number settings in the Edit and Threshold and has the surface and size and is scientifically proven in practice
Any type of magnetometer or ion detector system or any system that is presented as a ground scanner imaging or GPR or ground penetrating radar and is tested with a mobile phone and magnet and LED and low energy lamps and is not tested with gold and silver in depth does not have a real radar circuit and GPR or ground penetrating radar or scanner imaging and is not reliable and in principle does not pick up gold and silver and new and old metals and does not differentiate and discriminate
Source of books by the scientist of electronic sciences of radar Ramin Keykhosravi with permission
