proximity sensor & proximity switch 1) inductive or capactive 2) ... to metal; 2) Optional current output, including 200 and 300mA; 3) Optional sensing distance, from 2mm to ... different dimension; 3) Optional current output, including 200 and 300mA; 4) Optional sensing distance, from 5mm to ... 200 mA; 3) Optional sensing distance, including 10mm and 25mm; 4) Different column diameter, including M18, M30 ...