Automating routine contamination frisking using instruments like Ludlum’s Small Article Monitor is a well-proven methodology for ensuring that items leaving controlled areas are clean. Ludlum’s new Model 54 has adopted time-tested and proven concepts, gathered from throughout the industry, and integrated them into a new, ground-up design that employs the latest computer and detector technologies. The result is a more robust, user-friendly, and cost-effective design than any other currently available.