In environments with tighter security requirements, tailgating can pose unnecessary security risks. The DSI Entry Sentry is designed to deter such activity. Using unique algorithms, this solution can allow people with briefcases or pull bags to pass without causing alarms, making it one of the most accurate and cost-Effective anti-tailgate devices in the industry. The Entry Sentry series is available as both a standard unit (ES5200) and a unit with voice (ES5600).