Description Always on guard against pilferage, Sentry Technology's surveillance products keep watch over stores and distribution centers. The company manufactures and installs electronic article surveillance (EAS), radio frequency (RF), and closed-circuit television (CCTV) systems. Its traveling SentryVision SmartTrack CCTV system is designed to pan, tilt, and zoom in order to provide unobstructed views. Clients include retailers wanting to deter theft, and institutions wanting to protect assets and people. In addition, Sentry Technology's electro-magnetic (EM) and RF identification (RFID) based Library Management systems are used by libraries to secure inventory and improve operating efficiency.