ABSTRACT
Metal contamination can occur from crushing, mixing, sieving, or cutting operations. Metal detectors are used to protect machinery and/or the consumer. Products such as meat, cheese, yeast, dough, fresh bread, processed vegetables, and fruits are very conductive in terms of metal detection. In general, the higher the frequency, the easier it is to detect metal in a three-coil type of detection system. A single sider detector is mostly used in the textile industry, or anywhere else where the product height does not exceed three-eighths of an inch. The transmitting coil of the spacered detector is located in the bottom block; the two receiving coils are located in the top block. Larger detectors perform better at 200 kHz if the product is nonconductive. The self-check circuit eliminates periodic checking of the metal detector. Make sure the sensitivity promised by detector manufacturers can be obtained while running the product to be tested.
