3D Printer Filament Detection Sensor Module Filament Run-Out Pause Detecting Monitor for 3D Printer Lerdge Board 1.75mm Filament 【3D Printer Accessories】Very practical filament detection sensor module, ideal accessories for 3D printer, making your printing work smooth and relieved. 【Main Function】For checking the filament is whether run out or not, it automatically stops the 3D Printer when the filament runs out. 【Filament Detection Module】Newly designed smart module, The main board executes the pause command operation when the filament is run out. 【Extended Product Life】A wear-resistant copper sleeve is added to the feed port and the discharge port at the same time can effectively prolong the service life of the product.