Metal detector is a device which responds to metal that may not be readily apparent. Metal detectors are used in the immigration, pharmaceutical, food, beverage, textile, garment, plastics, chemicals, lumber, and packaging industries.
Contamination of food by metal shards from broken processing machinery during the manufacturing process is a major safety issue in the food industry. Metal detectors for this purpose are widely used and integrated into the production line.
Current practice at garment or apparel industry plants is to apply metal detecting after the garments are completely sewn and before garments are packed to check whether there is any metal contamination (needle, broken needle, etc.) in the garments. This needs to be done for safety reasons.