It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching.When proximity switch is close to some target object, it will send out control signal.It's widely used in machine, paper making, light industry for limiting station, orientation taking count, speeding trial .Product Name : Inductive Proximity Switch;Model : LJ12A3-4-Z-BX;Wire Type : 3 Wire Type (Black, Brown, Blue);Switch Appearance Type : Cylinder Type : Inductive Sensor;Output Type : NPN NO(Normal Open);Thread Diameter : 12mm;Head Diameter : 11.8mm/0.46 inchDetecting Distance : 4mm;Supply Voltage : DC 6-36V;Current Output : 300mA;Response Frequency : 150HzDetect Object : Iron;Operating Temperature : -25C to +55C (Non-freezing Condition);Cable Length : 110cm/43.3 inchExternal Material : Plastic, Alloy;Net Weight : 176g;Color : Silver Tone, Yellow, Gray;Package Content : 4 x Inductive Proximity SwitchOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.