IFM Electronic KI0054 Capacitive sensor; M30 x 1.5 / L = 90 mm; Sensing range 5…40 mm; Non-flush mounting; Normally open / Normally closed; (selectable); AC/DC; 1/2″ connector; IP 65; IP 67; 2-wire; Ambient temperature -25…80 ??C; Switching frequency 10 Hz AC / 10 Hz DC