... wire and AC 2 wire type. TK series column shape inductive type with follow features: 1) Inductive type, sensitive to metal; 2) Optional current output ... type, sensitive to metal; 2) Square sensing face, with different dimension; 3) Optional current output, including 200 and 300mA; ... to different material, including metal or non-metal; 2) Current output 200 mA; 3) Optional sensing distance, including ...