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 : Capacitive Proximity Switch Model : LJC30A3-H-J or EZ Wire Type : 2 Wire (Brown, Blue) Switch Appearance Type : Cylinder Type : Capacitance Sensor Output Type : NO(Normal Open) Diameter of Head : 30mm Detecting Distance : 0-20mmDetecting Object : Metal or Nonmetal Material Supply Voltage : AC 90-250V Current Output : 400mA Response Frequency : 7HzOperating Temperature : -25C to and65C (Non-freezing Condition) Cable Length : 120cm or 47 inch External Material : Plastic, AlloyNet Weight : 378g Color : Silver Tone, Yellow, Gray Package Content : 3 x Capacitive 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.