Metal detectors detect metal contaminants in food products. They use electromagnetic fields to identify any metallic objects present in the food. When a metal object passes through the detector, it disrupts the electromagnetic field, triggering an alarm or signal. This alert indicates the presence of metal contamination in the food. Metal detectors can detect various types of metal contaminants, including ferrous metals (such as iron and steel), non-ferrous metals (such as aluminum and copper), and stainless steel. They are particularly effective at detecting metal particles, fragments, or foreign objects that may have accidentally entered the food during processing or packaging. However, it is important to note that metal detectors are not able to detect non-metallic contaminants, such as plastic, glass, or rubber. For the detection of non-metallic contaminants, X-Ray inspection systems may be preferred.