The scanning depth of gold detectors can be affected by a number of factors, including the size of the find, the type of soil and the detector settings. In general, metal detectors can be able to detect small metal objects at depths of a few centimeters, while larger objects can be detected at greater depths. However, it is important to note that actual scan depth may vary depending on the factors mentioned. It is recommended to adjust the detector settings accordingly and become familiar with the specific workings of your detector model in order to get the best possible results.