It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching. When proximity switch is to some object, it will send out control signal. As it is capacitive type proximity switch, detecting object is not limited to only conductor, also liquid and even powder things, like plastic, water, glass, oil, etc. It's widely used in machine, paper making, light industry for limiting station, orientation taking count, speeding trial . Product Name : Capacitive Proximity Switch Model : LJC18A3-H-Z/BY Wire Type : DC 3 Wire Type (Brown, Black, Blue) Switch Appearance Type : Cylinder Type : Capacitance Sensor Output Type : NO(Normal Open) Diameter of Head : 18mm Detecting Distance : 1-10mm Detecting Object : Metal or Nonmetal Material Supply Voltage : DC 6-36V Current Output : 300mA Response Frequency : 100Hz Operating Temperature : -25C to and65C (Non-freezing Condition) Cable Length : 120cm/47" External Material : Plastic, Alloy Net Weight : 85g Color : Silver Tone, Yellow, Gray Package Content : 1 x Capacitive Proximity Switch 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 1-3 cm.