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LJ12A3-4-Z BX Inductive Proximity Sensor Detection Switch DC6-36V NPN Normally Open Electronic Cable Wire LJ12A3-4-Z Product Description Working Principle:  Inductive proximity switches, also known as inductive proximity sensors, metal sensors. The switch contains high-frequency oscillation circuit, detection circuit, amplifier circuit, the solution circuit and the output circuit. When the power is supplied to the switch, the oscillator in the high frequency oscillation circuit generates an alternating electromagnetic field on the detection surface of the switch. When there is a metal close to the switch detection surface, the eddy current inside the metal absorbs the energy of the alternating electromagnetic field in the oscillator. The oscillator is weakened or stopped. Oscillator energy changes in the two states, the detection circuit is converted to a level signal, through the amplifier circuit to amplify the level signal after the trigger circuit to trigger the output transistor transistor circuit to produce a switch signal. Thereby detecting the presence or absence of the metal. To achieve the purpose of metal detection.   Characteristic Parameter: Lag distance: detection distance of 10% or less Detection of objects: metal body Power supply voltage: DC type: DC12-24V (6-36V) Pulsation (P-P) 10% or less, AC type: AC110V-250V 50 / 60HZ Current consumption: NPN PNP type 13MA or less Control output: DC type: 300MA or less, AC type: 400MA or less Self-protection: DC type: power supply wrong protection, surge absorption protection, load short circuit protection. Use of the environment: Temperature: -30 degrees to 70 degrees (no ice without cream -30% RH - 95% RH) Insulation resistance: 50 megohm (DC500 megohm table) between the charging part and the shell Withstand voltage: AC1000V 50 / 60HZ 1min between the charging part and the shell Temperature effects: temperature range -30 degrees to 65 degrees. 23 degrees, plus or minus 15% within the