MPSM Low Filament Sensor holder

Instead of watching my printer while getting close to the end of the roll of filament, I picked up a Low Filament Sensor from EndLessParts.com http://tinyurl.com/j63ecw5 . It’s a fairly simple device that lets out a loud buzzing sound when the end of the filament has passed by it, giving you time to pause the print and change out the filament with a fresh spool. The sensor has two sets of roller bearings that are spring loaded so that when the last of the filament passes through the roller beari