SUNLU FilaDryer S4 Pro, Dual-Zone Filament Dryer with Independent Temperature & Time Control, 85℃ Max Temperature, Drying & Annealing 2-in-1, Fits 4 × 1kg Filament Spools

The SUNLU FilaDryer S4 Pro is the next-generation intelligent filament dryer designed for serious makers and professionals. Featuring an innovative dual-zone independent heating system, the S4 Pro allows two separate drying chambers to operate at different temperatures simultaneously, making it ideal for drying multiple filament types at once without interference.

Supporting temperatures up to 85°C, intelligent humidity control, and three professional drying modes, the S4 Pro delivers faster, more efficient, and safer filament drying while maintaining outstanding print quality.

[Smarter Drying, Better Printing] The SUNLU FilaDryer S4 Pro is designed to help makers and professionals keep filaments dry, stable, and ready to print. With dual-zone independent control, automatic humidity management, and built-in annealing mode, it delivers a more efficient and flexible filament drying experience.

[Dual-Zone Control, More Flexibility] The SUNLU FilaDryer S4 Pro runs two different drying settings at the same time. Dry PLA / PETG in one chamber while conditioning PA / PC / PP in the other, or set separate programs for different materials to save time and boost productivity.

[Faster Heating, Faster Results] Reach 85°C / 185°F more quickly with upgraded heating and airflow circulation. This helps remove moisture more effectively, reduces stringing, and improves layer adhesion for smoother print performance.

[Built for Advanced Materials] Add professional annealing support to your 3D printing workflow. The built-in annealing mode helps improve strength, dimensional stability, and heat resistance, making it ideal for PA, PC, PP, and other engineering filaments that require an annealing temperature at/within 85°C.

[Smart Humidity Management] Set your target RH range from 30% to 50% and let the dryer do the rest. The system automatically starts when internal humidity reaches the set level and stops at 25% RH, helping keep filaments protected and ready to print.

[One Dryer, Multiple Adaptations] Compatible with PLA, PETG, TPU, ABS, ASA, PA, PC, Nylon, Carbon Fiber, Glass Fiber, and more. A large-capacity design for 4 × 1kg spools makes it a reliable choice for home studios, workshops, and 3D printing farms.