BigTreeTech Smart Filament Runout Sensor


Availability: In stock

(1 customer review)

The BTT Smart filament sensor uses, as the name suggests, a sensor. Compared to other switch type filament run out devices the sensor is capable of detecting abnormal flow in your filament. If the intelligent sensor detects an issue it will prompt your 3D printer to safe guard you against catastrophic failure.


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BigTreeTech Smart Filament Runout Sensor vs Switch Type Sensor:

A simple switch type sensor only has two positions, on and off. This means it is only capable of detecting breaks in the filament. If the filament runs out the switch will simply go into the off position prompting the printer to pause. With the Big Tree Tech Smart Filament Runout Sensor it is capable of detecting breaks as well as flow. So for example, your filament spool becomes tangled making your extruder unable to draw any more filament, the BTT Smart Sensor will detect this abnormality in the flow and halt your printer. With a switch type the switch is unable to detect flow, therefor it will continue to try to print, slowly grinding away filament into your extruder gears causing more issues. The BTT Smart Sensor is made to be compatible with all controller boards with filament runout sensor ports.

BTT Smart Filament Sensor Features:

Voltage: 3.3V-5V
Filament size accepted: 1.75mm
Detection Length: 7mm
Firmware: Marlin 2.0.x / Klipper

Package Contents:

1 x BigTreeTech Smart Filament Runout Sensor
3x Bowden Fittings
2x Hex head bolts with washers
1x Cable

Product weight/dimensions:

60g/75mm x 35mm x 29.55mm

Adaptation Models:

Any motherboard with break detection interface can be used.


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All items listed are in stock in AUSTRALIA south east Queensland and will be shipped same day when ordered before 3pm AEST by Australia post.
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Weight 144 g
Dimensions 260 × 160 × 50 mm


1 review for BigTreeTech Smart Filament Runout Sensor

  1. Chris D. (verified owner)

    So good for multiple day prints. Gives a little piece of mind knowing I don’t have to keep an eye on my printer 24/7

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