The present disclosure is generally directed to a process for controlling the quality of manufactured absorbent articles, the process including incorporating into an absorbent article at least a portion of a wetness sensing system that is configured to detect the presence of a substance, the wetness sensing system comprising at least one metallic conductive element; and passing the absorbent article in proximity to a foreign material sensor employing x-ray technology, the foreign material sensor adapted to detect the presence of foreign material to confirm whether foreign material has been incorporated into the article.