Filament Runout Sensor - No nuts or bolts needed

thingiverse

No hardware, fast print, long throw filament out sensor. This switch housing and plunger are designed for rapid printing without supports and do not require anything more than the switch, some bowden tubing, and possibly a small amount of unused filament. There are two small zip tie slots and an M3 hole for mounting options. The filament does not come into contact with any moving parts other than the bowden tube, preventing wear or contamination. The throw of the switch is maximized to minimize false readings. This print requires a printer capable of producing an 18mm bridge without difficulty.