Packaging is a crucial aspect of product safety and quality, particularly in the food industry. It is typically divided into primary and secondary packaging. Primary packaging is the material that directly encases the product, such as a bottle, can, or wrapper, providing a barrier against contamination and physical damage. Secondary packaging groups primary packages together, facilitating handling, transportation, and branding. Examples include cardboard boxes and shrink wraps. Metal detectors play a vital role in ensuring the safety and integrity of packaged products. They are used to detect and reject products contaminated with metal fragments, which can occur during manufacturing processes. Metal detectors are typically placed at the end of the production line, inspecting both primary and secondary packaged goods. The effectiveness of metal detectors depends on several factors, including the type of metal (ferrous, non-ferrous, or stainless steel), the size and shape of the contaminant, and the packaging material. Limitations include difficulty detecting non-magnetic stainless steel and interference from metallic packaging materials. Despite these challenges, metal detectors are essential for maintaining product safety, protecting consumers, and ensuring compliance with industry regulations.