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 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 inch Detecting Distance : 4mm; Supply Voltage : DC 6-36V; Current Output : 300mA; Response Frequency : 150Hz Detect Object : Iron; Operating Temperature : -25°C to +55°C (Non-freezing Condition); Cable Length : 110cm/43.3 inch External Material : Plastic, Alloy; Net Weight : 264g; Color : Silver Tone, Yellow, Gray; Package Content : 6 x Inductive Proximity Switch Only the above package content, other products are not included. Note: Light reflection 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.