IFM electronic IE5391 Inductive sensor; M8 x 1 / L = 60 mm; Sensing range 4 mm non-flush mountable; normally open; DC; PNP; M8 Connector; IP 65; IP 67; (with ifm socket duly screwed on); 3-wire; Ambient temperature -25...70 °C; Switching frequency 1000 Hz