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  • LJ12A3-4-Z/BX NPN DC6-36V Inductive Proximity Sensor Switch for
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LJ12A3-4-Z/BX NPN DC6-36V Inductive Proximity Sensor Switch for


Shipping Weight:75g

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For those who 3D print a lot or 3D printing beginners, manually leveling a 3D printer can be time consuming and a bit mysterious. Getting it "just right" requires a good eye and constant attention while printing the first layer. Well, here comes the Inductive proximity sensor switch for 3D printer auto-leveling.

This inductive proximity sensor switch makes the auto-leveling function for 3D printers more accurate and convenient. This feature will enable your printer to take several bed leveling readings and calculate a level plane so your prints are always level. While printing each layer, you z-axis will be in constant motion to compensate for an un-level bed.



Save time messing with springs and screws on your print bed. Run the Auto-level procedure before every print or just one time for each start-up of the printer.

Less issues related to un-level print beds like parts coming up on one corner and nozzles jamming because the print started too close.

Note: To set up your printer for auto-leveling, you need to update your firmware and make a mount for your Inductive Proximity Switch. 

Product Features:

Wire Length: 110cm

Output Type: NPN

Detection Distance: 4mm

Compatible with Prusa I3, Kossel and other printers

Switch Appearance Type: Cylinder Type

Dimension: M12x 60mm

Supply Voltage: DC 6-36V

Power (Positive): Brown

Power (Negative): Black

Common/ Ground: Blue

wire length:115cm

Package include: 1pc x Inductive Proximity Sensor Switch

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  • Arthur Gevaerd Neto | 01/10/2018

    Is it comnpatible with PRUSA I3 X? do u send us the code?

    • Zina Luo | 01/15/2018

      Hi Arthur ,yes ,but need resive the code by yourself .You can search some more on facebook or google for help.

  • Felix Manuel Manso Rojero | 11/24/2017

    Is it compatible with Prusa I3 Pro C dual extruder? Is it better than 3D Touch sensor?