IFM electronic IGC266 Inductive sensor; M18 x 1 / L = 60 mm; Sensing range 8 mm flush mountable; normally open; DC; NPN; 2 m PUR-Cable; IP 65; IP 66; IP 67; IP 68; IP 69K; (IP68 specification: minimum pressure of 0.5 bar for 7 days of continuous immersion