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. As it is capacitive type proximity switch, its detecting object target is not limited to only conductor, but 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 : PNP 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 +65C (Non-freezing Condition); Cable Length : 120cm/47 inch; External Material : Plastic, Alloy Net Weight : 425g; Color : Silver Tone, Yellow, Gray; Package Content : 5 x Capacitive Proximity Switch Only 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.