Which turnstile type uses electronic beams to create a virtual barrier for detection and notification?

The optical turnstile is designed to use electronic beams that create a virtual barrier, effectively managing access control. In this type of turnstile, the beams are typically positioned at waist level and monitor the passage of individuals. When someone attempts to pass through, the system detects the interruption of these beams and can trigger notifications, alarms, or access permissions accordingly. This technology enhances security by accurately counting entrants and exits, preventing tailgating (where unauthorized individuals follow closely behind authorized persons).

Other types of turnstiles, such as waist-high or full-height turnstiles, typically rely on physical barriers to control entry. While they may incorporate some electronic components for monitoring, they do not utilize the concept of virtual barriers as effectively as optical turnstiles do. Similarly, manual turnstiles rely entirely on human operation for access and do not utilize electronic detection methods, making them less effective in automating security monitoring tasks.