Which test pieces should be used to verify sensitivity on a commercial metal detector?

Use certified test pieces for ferrous, non-ferrous, and stainless-steel detection at the intended product speed. When the machine is part of a line, evaluate its performance together with the actual production sequence and buffers. Safety functions and abnormal-condition behavior should be tested separately from ordinary production performance. This makes the procurement requirement easier to verify and gives the production team a repeatable operating reference. The goal is a repeatable technical definition that purchasing, production, quality, and service teams can all use after delivery.