Based on this product's specifications, here are some alternatives and similar models
Filament sensor FlashForge AD3 30001361002 for 3D printers
Summary description:
Filament sensor FlashForge AD3 30001361002 is an accessory for 3D printers that detects filament presence and interruption. Designed to integrate with compatible FlashForge models, it helps prevent failed prints by pausing the printer when filament runs out or breaks. Suitable for continuous printing workflows and reduces material waste and reprints.