Product Name Inductive Proximity Switch Model LJ12A3-4-Z/BX Theory Inductive Sensor Wire Type 3 Wire Type (Brown,Black, Blue) Switch Appearance Type Cylinder Type, Metal Shell Output Type NO NPN Detecting Distance 4mm Supply Voltage 6-36VDC Output Current 300 mA Detect Object Iron Column Sensor Diameter 12mm/0.47" Total Size 60 x 21mm/ 2.36 x 0.83 (L*Max.D) Threaded Diameter 12mm/0.47" Cable Length 1.2m/47 External Material Metal