Security Defense Systems is a distributor of metal and handheld weapons detectors for courthouse, prison, jail, airport and related security applications; Conveyorized airport type x-ray screening & portable systems for detection of explosives, weapons, narcotics & related contraband; computerized real-time automated x-ray inspection systems for detecting metal, bone fragments, plastics & related contraband In processed & cased food & pharmaceutical products; computerized real-time imaging systems utilizing image intensifiers, linear arrays & digital amorphous silicon imagers for non-destructive testing & related quality control applications.