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Sensors / Proximity
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LJ12A3-4-Z/BX Inductive Proximity Sensor Switch NPN DC 6V-36V

KSh600.00

Features:

  • Detection Distance: 4mm
  • Voltage: DC 6-36V
  • Polarity: NPN
  • Dimention: 12 x 50mm
  • Black or Gray wire

Out of stock

SKU: 10904 Categories: Proximity, Sensors
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Description

 Description

  • Proximity sensor that detects nearby metal, including aluminum foil; a great solution for heated bed calibration.
  • The LJ12A3-4-Z/BX proximity sensor will detect large metal fields at 4mm distance with great precision.
  • This allows you to accurately measure the distance to an (aluminum) heated bed for example.
  • If you are using a glass plate as your print surface, you can use aluminum foil right below the glass, which will also be detected by the sensor (mirrors however are not detected).
  • The sensor is equipped with a small red detection LED, indicating a nearby object.
  • The sensor has an M12 threading and includes a nut for easy mounting to your 3D printer or CNC machine.
  • The LJ12A3 is a NPN Normally Open (NO) type of proximity sensor, which means when nothing is detected the resistance on the black wire is high.
  • Upon detection the resistance will be low and connects to ground. Use the internal pull-up on your Arduino.
  • Most modern 3D printer firmwares have some sort of auto bed leveling procedure available, but you will need to enable it.
  • You can use this sensor as the z_min_endstop for example, replacing your current end stop. Most firmware will also use the min endstop as a probe, but some allow a separate probe to be defined.
  • This sensor operates at 6-36V, so as the signal voltage is the same as the input voltage, also the signal will be 6-36V.
  • You will need to down-convert the voltage to acceptable level for your electronics. Put a 10K resistor between the black signal line and your 5V electronics input to avoid damage.
 Drawing

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