Metal Detector For Pharmacy. Metal detectors are generally designed to detect metals using electromagnetic rays directed to objects or individuals. The use of metal detectors is very much, not only for security, or archeologists but also for the medicines industry.The use of metal detectors for the drug industry is aimed at contamination of drugs from fragments of metal from previous processing machines that are problematic or damaged during the process. The Metal detector is used to check the quality of drugs before packing and last.