Application Value and Selection Points of X-ray Foreign Body Inspection in Food and Pharmaceutical Industries

X-ray foreign body inspection works by imaging the differences in X-ray absorption among materials. Dense contaminants such as metal, glass, stone, bone fragments and hard plastics create contrast against food or pharmaceutical materials and can be identified and rejected. Compared with metal detectors, X-ray systems are not affected by aluminum foil or metallized film packaging and can also detect non-metallic contaminants, making them suitable for production stages with tighter foreign body control. Sensitivity depends on product thickness, density and packaging, so actual product testing is needed before selection.

In the food industry, X-ray inspection is commonly used for meat, seafood, bakery, nuts, condiments and prepared dishes, checking bulk, bagged and boxed products for bone fragments, shell pieces, glass and metal wear particles. In pharmaceuticals, it is often applied to blister packs, bottled solid dosage forms and soft bags to check for missing tablets, broken pieces and contaminants inside packaging. Both scenarios require stable conveying speed, adjustable detection thresholds and traceable rejection records that link to batch management.

When selecting equipment, evaluate detection accuracy, throughput, protection rating, cleaning method and software functions. Ask suppliers for test reports based on your own products, specifying detectable contaminant size and position conditions. Check radiation safety interlocks and routine inspection requirements for regulatory compliance, and examine rejector reliability and false rejection rates. After installation, establish regular verification and operator training so performance remains stable over time. Final configuration should follow actual line test results.