The MPH (Magnetic Pedestrian High Door) Series pedestrian barrier was developed to control the access of persons under medium to high security requirements. Closure takes place immediately after passage or after an adjustable hold-open time. The opening and closing times can be programmed to be different from each other, the times depend on the height of the glass flaps. In its initial position the barrier is closed; it can be operated in one direction only, or in both directions. MPH barriers are available in two versions. The standard version permits unimpeded passage for persons. The Wide lane has a greater lane width and provides optimum passage for persons with luggage and for wheel chairs. A line or installation consists of at least two modules.