“…The sensitivity levels of five of the fire detectors/detection systems in the test series were the same as in the previous minimum airflow tests [10]. However, the sensitivity levels of the linear heat detection system D-2L2, the optical flame detector D-3F1, the flame/smoke VID detector D-4C1 and the VID fire detector D-5C2 were modified by the system suppliers, based on their performances in environmental tests in the Lincoln Tunnel [14] and in the minimum airflow tests [10].…”