I would recommend this filament detection sensor for every 3d printer. It is really convenient to have this sensor installed. And when programmed in the printer software it lets the printer pause whenever the sensor detects no filament. There is some contact between the sensor and the filament, but this does not cause any troubling drag on the filament. At this price it is an excellent and usefull addition. Note: the sensor also works on other brands of 3d printers besides Tronxy!
Main features: ●High-performance, easy and convenient to use ● Smart module designed for detecting the status of the use of filament ● Built-in wearable copper in the feed inlet and outlet to extend the life span ●Automatically stops the 3D Printer when the filament runs out, so you will have a chance to supplement the filament