IFM electronic IE5356 Inductive sensor; M8 x 1 / L = 40 mm; Sensing range 2 mm flush mountable; normally open; DC; PNP/NPN; M8 Connector; IP 67; (with ifm socket duly screwed on); 2-wire; 3-wire; Ambient temperature 0...60 °C; Switching frequency 800 Hz