Optical Interlock Switches: Type - Safety System Fiber Optic Interlock Switch; Optical Element Orientation, Type - Dual (Active), Center Mounting; Operating Distance - Separation - 1-50 mm (0.04-2"); Fiber Type - Plastic, PTFE-Coated; Fiber Size - 2.2 mm (0.087") Dia.; Fiber Length - 30.4 m (100 ft); Enclosure Construction - Cast Zinc Housing, Glass Window; Mounting - Holes for M6 Screws (hardware not included); Enclosure Rating - IEC IP67; Safety Rating - Category 4; Temperature Rating - 0 to 70 deg C (32 to 158 deg F); Control - Controller Not Included; Manufacturer Series - PICO-GUARD