BLV MGN - Runout Sensor - Capteur optique fin de filament

Remix with bearing.

Components :
4 x 3mmx4mm magnet
1 x ball bearing MR63
3 x screw M3 x 10mm
a few cm of PTFE tube 4mm OD

Optical sensor:
https://www.amazon.fr/Suppyfly-Optical-Endstop-Switch-Printer/dp/B07WRB4XHN/ref=sr\_1\_11?\_\_mk\_fr\_FR=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=optical+endstop&qid=1581063153&sr=8-11