... chosen from 3 meters to 6 meters, and barrier gate4. closing time is also arranged from 1 second to 6 ... memory limit) for beam rises and falls.Technical data:1) Beam length: <=6m2) Opening (Closing) time: 1s, 3s, 6s3) Center ... Turnstile, Tripod Turnstile,Security Tripod Turnstile,Safety Tripod Turnstile,Access Control Tripod Turnstile,Semi-automatic Tripod Turnstile,Automatic Tripod Turnstile,Electric ...