Which items are not easy to detect by a metal inspecting instrument?
The conductive and magnetic metals such as iron, steel, carbon steel and tungsten carbide as the most easily detected by the metal, because of their metal detector magnetic field has remarkable effect. The same is true of other low resistance nonferrous metals, such as copper, aluminum, lead, brass, bronze and so on. Although they are not magnetic, they are conductors and are easier to detect. Only those pure, high resistance and non magnetic metals, such as stainless steel, pose the greatest challenge to metal detectors. They are poor in conductivity and difficult to detect but are often used in food and packaging machinery. But as long as the detector has good performance, they can still be reliably identified.
Metal detector is an instrument designed to detect metal, except for the detection of a metal or metal parts of the mine, but also can be used to detect hidden in the walls of the wires, buried in underground pipes and cables, and even underground treasure, found metal objects buried in the ground. Metal detectors can also be used as equipment for youth defense education and popular science activities, and of course, it is an interesting entertainment toy.