Uxcell Inductive Proximity Switch Sensor NPN Normally Open, 6-36V DC, 12 mm Diameter, 4 mm Product name : inductive Proximity switch; model : lj12a3-4-z/BX; Theory : inductive sensor; wire Type : 3 wire Type (Brown, Blue, black) Switch appearance Type : cylinder Type, metal shell; output Type : NPN No; detecting distance : 4mm; supply Voltage : DC 6-36v Output current : 300mA; detect object : iron; diameter : 12mm/0. 47 inch Total Size : 60 x 20mm/ 2. 4" x 0. 8" (l*max. D); cable Length : 1M/3. 3'; external material : plastic, metal Net weight : 47G; main color : Silver Tone, Yellow, black; package content : 1 x inductive Proximity switch