A magnetic detector or a magnetic metal detector or a magnetic long range locator, in a situation where it uses the characteristics of magnetism, it has the maximum ability to separate ferrous metal or non-ferrous metal from each other. It does not separate non-ferrous metals or precious metals such as gold, silver, copper, and zinc, which are in the same non-ferrous layer and have close reflection of each other, well and with high accuracy, or on metals of all gold layers or disturbing particles. It has the same reaction to gold and does not show a separate reaction on such non-ferrous targets that are of the same class