Comparison : Item # 111-000-0500, Banner Minibeam Fiber Optic Sensor
Item # 111-000-0521, Level Sensor, Photo-Elec, w/Suppression
Item # 111-000-0518, Level Sensor, Photo-Elec, Vis-Red LED
Item # 111-000-0535, Banner Minibeam Fiber Optic Sensor, QD
Item # 111-000-0522, Level Sensor, Photo-Elec, w/Suppression, QD