Fiber optic sensor SU18-16/40a/110/115a/126a, Fiber optic sensor for glass fiber optics and plastic fiber optics, Fiber Optic Sensors, Basic line for DIN rail installation, Sleek design, 3 response times selectable, High switching frequency, Self diagnosis function, Seal chloroprene, Suitable for operation in Zone 1, Zone 2, Zone 21 and Zone 22