Product Name : Inductive Proximity Switch;Model : LJ12A3-4-Z/AX;Theory : Inductive Sensor;Wire Type : 3 Wire Type (Brown, Blue, Black) Switch Appearance Type : Cylinder Type, Metal Shell;Output Type : NPN NC; Detecting Distance : 4mm(+/-10%);Supply Voltage : DC 6-36V Output Current : 300mA;Detect Object : Iron;Column Sensor Diameter : 10.4mm/0.4";Thread Diameter : 12mm/0.5" Total Size : 66 x 21mm/ 2.6'' x 0.8'' (L*Max.D);Cable Length : 1.16m/35.7'';External Material : Plastic, Metal Net Weight :100g;Color : Blue Tone, Black ;Package Content : 2 x Inductive Proximity Switch Description: Case material: Metal / Copper Output Status: Normally Close Detection objects: Conductor Voltage: DC 6-36V Output Current: 300mA Polarity: NPN Dimension: M12x1x55mm Detection Distance: 4 mm Part number: LJ12A3-4-Z/AX Three wires wiring connection: Brown is connected to the positive power supply. Blue is connected to the negative power supply. Black is connected to the load. Package Included: 2X Inductive Proximity Sensor Detection Switch