Description: Newly designed smart module for detecting the status of the filament. Built in wear resistant copper sets added in both the inlet and outlet to effectively extend the product life. Use on main board: When there is material, the green light of the module is always on. When the material is used up, the green light goes out. The main board executes the pause instruction operation and waits to replace the good material and then continues printing. For use on other main boards: The material detection module uses the level jump detection method. When there is material, the level signal of the detection port should be high level. When there is no material, the level signal of the material port goes low. If the high-to-low transition is determined, the material is considered exhausted and a pause instruction is executed. After replaced the material, the printer continues printing. Applicable filament diameter: 1.75mm/3mm. Specification: Total Size: 38x30x12.7mm/1.501.180.5inch Mounting Hole Size: 2.8mm/0.11inch Mounting Hole Distance: 20mm/0.79inch Cable Length: 1m/3.28ft Material: Plastic Color: White+ Black Package Includes: 1 Piece 3D Printer Detection Sensor Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !