Phantom metal detection systems have a fast and powerful digital signal processing system (DSP). Systems are user-friendly, easy-to-set-up and operate, and provide on-line, accurate detection of all ferrous and non-ferrous tramp metals, including stainless steel as small as 2 mm. In addition to custom-sized apertures and 26 inches wide conveyor belts, each system features automatic set-up and operation, automatic self-test and diagnostics, multiple product memory for fast product changeovers, automatic compensation for product effect, data security and modular electronics.