... needle detector 1. Purpose:Designed for food industrial and pharmaceutical industrial use. Detecting metal fragments (iron, copper, aluminum, lead, tin, stainless steel ... detects not only ferrous, but also non-ferrous metal objects (iron, copper, aluminum, lead, tin, stainless steel, etc.).(2) ... 300mm(2) Detection Sensitivity (mm) Metal objects 2.5 Iron 5.0 Stainless steel 3.0 Lead, aluminum, copper(3 ...