ANTCLABS BLTouch Auto Bed Leveling Sensor with 1M Extension Cable Set Review (2026)

Who should buy the original BLTouch

This listing is for the ANTCLABS BLTouch sensor itself plus a 1M extension cable, not a full leveling kit with a printer-specific mounting bracket. It fits owners of open-frame FDM printers, commonly Ender-3 and similar Creality-style machines, who are moving from manual bed leveling to an automatic probe and want the reference design rather than a clone. Because it is sold as the sensor and cable only, it suits someone comfortable sourcing or 3D printing their own mount, or who already knows their printer's mainboard supports a BLTouch-style probe. Buyers who want a complete plug-in kit matched to one specific printer model, mount and cable included, may be better served by a bundled kit from their printer's manufacturer instead of this standalone sensor.

How the sensor works

The BLTouch uses a solenoid-driven push pin controlled by an onboard ATtiny13A chip and a hall effect sensor, which lets it measure bed height at many points across the plate rather than relying on a single fixed offset. It runs on 5V at 15mA in normal operation, with a peak draw of 300mA when the pin actuates, and ANTCLABS rates its repeatability at around 0.005mm, which is precise enough to catch small warps in glass, PEI or textured steel beds. The polycarbonate case includes built-in self-test and alarm functions, plus a touch switch mode and a blue LED that indicates servo signal status, so a misbehaving probe is easier to diagnose than a bare limit switch. The included 1M extension cable is long enough to reach mainboards mounted away from the print head on larger frames.

Installing and living with it

Fitting the sensor means printing or buying a mount specific to the printer's X-carriage, wiring it to the mainboard's Z-probe header, and running a bed leveling firmware routine, which is a moderately technical job for someone new to 3D printer electronics. Once mounted, the probe runs automatically before each print, and most owners only interact with it when re-leveling after moving the printer or swapping build plates. Because this listing does not include a mount, buyers need to confirm compatibility with their frame before ordering, and factor in the extra step of sourcing or printing that bracket. Maintenance is minimal: keep the pin free of dust and filament debris, and avoid printing directly on top of the probe's contact point.

Genuine part versus clones and kits

Compared with third-party CR Touch style kits from Creality and Sovol, which bundle a printer-specific mount and cable for one model, this ANTCLABS listing costs more but delivers the original design those kits are based on. Reviewers and forums generally treat genuine ANTCLABS units as more consistent in build quality than budget clones, which can vary probe reliability between batches. The trade-off is convenience: a matched kit for something like an Ender 3 V2 or SV01 installs faster because the mount is already sized correctly, while this sensor-and-cable listing requires extra sourcing work in exchange for the reference-quality part underneath.

Verdict

The genuine ANTCLABS BLTouch earns our score of 8.6 out of 10 as a reliable, well-documented auto leveling sensor for anyone upgrading an open-frame printer and willing to source a compatible mount separately. Choose it over a clone if consistency and proven repeatability matter more than saving a few dollars. Buyers who want a one-box solution matched exactly to their printer model, with the mount and cable already sized, should instead look at a printer-specific CR Touch or BLTouch kit built for that frame, since those remove the extra compatibility research this standalone sensor requires.

Frequently asked questions