SUNLU FilaDryer S4 Pro, dual-zone filament dryer with independent temperature and time control, max. 85 °C temperature, 2-in-1 drying & annealing, suitable for 4 × 1 kg filament spools

The SUNLU FilaDryer S4 Pro is a next-generation intelligent filament dryer designed for ambitious makers and professionals. Equipped with an innovative, independent dual-zone heating system, the S4 Pro allows for the simultaneous operation of two separate drying chambers at different temperatures. This makes it ideal for drying different filament types in parallel without mutual interference.

With a maximum temperature of up to 85 °C, intelligent humidity control, and three professional drying modes, the S4 Pro ensures faster, more efficient, and safer filament drying for consistently excellent print quality.

[Dry smarter, print better] The SUNLU FilaDryer S4 Pro was developed to help makers and professionals keep filaments dry, stable, and ready to print. With independent dual-zone control, automatic humidity management, and an integrated annealing mode, it offers a more efficient and flexible drying experience.

[Dual-zone control, more flexibility] The SUNLU FilaDryer S4 Pro executes 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 increase productivity.

[Faster heating, faster results] Reach 85 °C / 185 °F even faster thanks to improved heating power and optimized air circulation. This helps to remove moisture more effectively, reduces stringing, and improves layer adhesion for smoother print results.

[Designed for advanced materials] Add professional annealing support to your 3D printing workflow. The integrated annealing mode helps improve strength, dimensional stability, and heat resistance, making it ideal for PA, PC, PP, and other technical plastics for printed parts with an annealing temperature of up to 85 °C.

[Intelligent humidity management] Set your target relative humidity (RH) range from 30% to 50% and let the dryer handle the rest. The system starts automatically when internal humidity reaches the set value and stops at 25% RH – keeping your filament optimally protected and ready to print at all times.

[One dryer, maximum compatibility] Compatible with PLA, PETG, TPU, ABS, ASA, PC, Nylon, and variants filled with carbon fiber or glass fiber. Thanks to its generous capacity for 4 × 1 kg spools, it is a reliable choice for home studios, workshops, and 3D printing farms.