Sentry Custom Security, is a subsidiary of Custom Security Industries Inc. a manufacture of value added EAS tagging solutions encompassing EM, AM, RF and RFID technologies.  Sentry designs, manufactures, markets and services a complete line of Library patron self service and RFID solutions as well as EM security systems, labels and accessories.  With experience dating from 1988, our customers include leading public, academic and specialty libraries relying on inventive, customer focused security solutions.