Smart Design: This module is designed to detect filament usage status. It automatically pauses your 3D printer when the filament runs out, giving you the chance to refill and prevent incomplete prints. Durable Construction: Reinforced copper components at the inlet and outlet effectively extend the product's lifespan. Practical Accessory: This filament detection sensor is a must-have accessory for your 3D printer, ensuring smooth and hassle-free printing. Easy to Install: Simple to install, stable in operation, and built to last. Description: The green light illuminates when filament is inserted. When the filament runs out, the green light turns off, pausing the print. Printing resumes after the filament is replaced. Operation: The filament detection module uses a level transition detection method. When filament is present, the detection level signal is high. When no filament is present, the signal is low. The system detects a transition from high to low, interprets this as filament exhaustion, and pauses the print. Printing resumes after filament replacement. Specification: Color: Black Material: PC + ABS Applicable Filament Diameter: 1.75mm / 0.069in Hole Size: 3.5mm / 0.14in Hole Spacing: 20mm / 0.79in Length: 1m / 39.4in Module Size: 38 * 30 * 12.7mm / 1.50 * 1.18 * 0.5in Motherboard Wiring: M-sensor port Package Contents: 1 x Filament Detection Sensor 1 x Cable Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.