Genuine ANTCLABS BLTouch v3.1 Auto Bed Leveling Sensor

Sale price$33.99


BLTouch is a type of electronic component for 3D printers with a built-in semiconductor Hall sensor or optical sensor.


BLTouch is an auto leveling sensor for 3D Printers that can precisely measure the tilt of Bed surface. It could work with any kinds of bed materials, such as glasses, woods, metals, and so on.

This comes with a standard cable (as pictured)if you need an extension, we have that here!

BLTouch-Smart V3.1 Manual​

BLTouch Wiring Guide


BLTouch is implemented with a simple structure and high precision by using an innovatively designed solenoid and detector (Hall sensor or optical sensor). It aims for user convenience and enjoyable printing by adding many smart functions, such as self-test, alarm, alarm release & Touch Switch mode, Blue LED for servo signal indicating and Z-probe(Zmin) Testing.


BLTouch can be easily applied, since it has a small and simple structure. As BLTouch works as usual auto bed leveling sensor, Gathering information & setting up your firmware will be an easy task.


Self-test : The push pin operate two times in a test when the power is on.

Alarm : The AI will flash the LED indicator if a problem is detected during a self-test or operation. The 3D printer can read the BLTouch alarm signal, and according to the alarm status, it can stop and pause the 3D printer with preset G-code, as well as operate the BLTouch release, stow, etc. Please do not ignore the alarm signal and make good use of it. It can keep your 3D printer and BLTouch safe.

Wiring defect indicator : Blue and Red LED for indicating wiring defects. 


BLTouch’s Standard Deviation in repeatability is around 0.005mm, at that precise.

Logic Voltage Free(Open Drain Output) 

3.3V / 5V logic voltage free(default).

Long stroke : ≒ 6.5mm

The stroke is up to 1.6mm longer than V2.0

         Engineering plastic(PC) push Pin

The initially applied metal pin has been replaced to safer engineering plastic pin.

The engineering pin can safely protect your 3D printer from inexperienced operation and the bent protrusion caused by the shrinkage of the output during printed.

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