IFM electronic IES221 Inductive sensor; M8 x 1 / L = 30 mm; Sensing range 3 mm flush mountable; normally closed; DC; NPN; M8 Connector; IP 65; IP 66; IP 67; IP 68; IP 69K; (with ifm socket duly screwed on); 3-wire; Ambient temperature -40...85 °C; Switchi