BIGTREETECH SFS V2.0 Smart Filament Sensor,Filament Runout Sensor Support Klipper/Marlin/RRF 1.75mm SKR MINI E3/Octopus for Ender 3 FDM 3D Printer

So much better than stock. I have these on two Neptune 4 Max, on which the stock extruder is prone to the blob of death. The sensors detect both runout and filament movement. The Klipper tweak is available on GitHub, the whole thing took two minutes.

The packaging from Bigtreetech looks great and really stand above other products. I have not installed the filament sensor yet but once I do I’ll come back and update it. So far I’m impressed with the look and feel of the product. I own other products and have been very pleased so far!

I used to have a filament sensor that was made from an old endstop that seems to work half the time. this new btt filament sensor works everytime, it also doesnt matter what direction you feed the filament in which is a huge plus as my old one only let me feed it in 1 direction. It only took 5 min to install including the coding i had to do for klipper!!!!

I had really high hopes for this sensor. I installed it and initially had pretty good results.Unfortunately, shortly after I installed it, the sensor started throwing all sorts of random errors when printing at higher speed. Multiple prints failed due to the sensor throwing an error saying filament had run out while it clearly still had filament in it. I worked through all diagnostics with BTT, I also completely disassembled the sensor because it was possible some filament dust could have disrupted the sensor. After completely disassembling, cleaning, and reassembling it the sensor worked a little bit better.Unfortunately though it started throwing errors after 1 print. After really trying to make this work I found I could not get a consistent result with this sensor. I had to remove it because randomly failing prints was causing too much frustration for no real value.I would steer clear of this sensor and just build one with an end stop sensor, a ball bearing, and a housing running the filament through it.

I ended up just disabling the encoder sensing in klipper and use it solely as a run out detection sensor.If the encoder worked reliability, this would of been 5 stars!

This sensor really saves prints. I tried to print some dragon using Silk PLA and I failed three times due to clogging.I decided to upgrade my printer and install this sensor and for now it paused my prints three times due to clogging but I was able to resume printing after clogging. So I'm continuing to print.Minor issue with sensor - you will need to mount them - I found the custom mount compatible with my print head (ender sprite pro) and printed them.P. S. The above is definitely a filament issue. I printed a lot without any clogging but glad to see I'm able to overcome filament clogging issue with this sensor.

I needed a new sensor for my FLSUN V400 and this looked ideal and probably would have been except for it doesn't detect filament (red light stays on while filament is in the sensor) then the little knob you move to insert filament fell off. Also there were no instructions which makes me think this was a return. Tried to contact BBT through Amazon, no response. I only have till 1/31 to return, so I guess I will return it. Super Disappointed. This sucks I wanted to buy a KNOMI V2.0 but I think I will skip it. I don't want to roll the dice again.

Both functions work