Edge light-type FOD detection sensors are associated with runway edge lights. For one 3,600m length runway, 120 sensors are needed. Compared with tower-type FOD detection sensors, edge light-type FOD detection sensors have high detection capabilities and are able to obtain clearer optical images, but require extensive power supply and communication system construction work, so they are applicable to new runways.
Tower-type FOD detection sensors are installed more than 200m from the runway centerline. For one 3,600m runway, 7 to 8 sensors are needed, which means less extensive construction work. However, the installation of tower-type FOD detection sensors is restricted by clearance and enclosure, so their installation design must be based on the specific conditions.