... 2mm to 15mm; 4) Different column diameter, including M8, M12, M18, M22, M30; 5) Different application, DC 3 wires, DC2 wires ... distance, including 10mm and 25mm; 4) Different column diameter, including M18, M30; 5) Different application, DC 3 wires or AC 2 ... (L)-18Y(YC)8DTKI(L)-30Y(YC)15DTKI(L)-18X5B M18 Inductive or Capactive Proximity Sensor / Proximity Switch