Ifm electronic if series inductive proximity sensors metal thread m12 x 1 ifm electronic ifk3004 ankgius 100 dps this inductive proximity sensor has a nickel plated brass body and m12 x 1 metal thread sensing range is 4mm and the sensor has an npn configuration suitable for general purpose use ifm ifk3004 ankgius 100 dps if7103 inductive proximity sensor 4mm nf conn