Eliminate stringing, bubbling, poor layer adhesion, and nozzle clogs caused by moisture absorption with the **SUNLU S4 4-Spool 3D Printer Filament Dryer & Dehydrator (Model DCUS-FD-S4-BK-US / Black)**. Engineered specifically for multi-printer print farms, multi-material systems (Bambu AMS, Prusa MMU), and high-temp engineering plastics, the S4 holds and actively dries up to **four 1 kg filament spools at the same time**.
Equipped with a powerful **350W PTC heating system** and **three internal forced-air circulation fans**, the chamber delivers fast, consistent 360-degree heat distribution reaching temperatures **up to 70°C**. This high-temperature threshold thoroughly bakes moisture out of notoriously hygroscopic filaments like Nylon (PA), TPU, PC, and ABS, as well as everyday PLA and PETG.
The unit features **intelligent automated humidity regulation**: it monitors internal moisture levels in real-time, automatically activating heat cycles when humidity rises between 30%–50% RH and stopping once humidity drops safely below 25% RH. This ensures your spools remain in peak printing condition 24/7 without consuming unnecessary power.
Designed for active printing, the S4 includes **independent PTFE guide tube outlet ports**, allowing you to feed dried filament directly to **up to four separate 3D printers** while the heating cycle runs. A built-in **triple-safety protection system** (self-regulating PTC core, hardware thermal cutoff switch, and firmware monitoring) guarantees safe, worry-free unattended operation.
Key Features:
* Massive 4-Spool Capacity: Interior chamber (450 x 210 x 211 mm) accommodates up to 4 standard 1kg spools simultaneously.
* High-Efficiency 70°C Heating: Reaches up to 70°C to dry engineering materials including Nylon, PC, TPU, ABS, and PETG.
* 350W PTC Core with 3 Fans: Triple-fan forced convective circulation prevents hotspots and ensures even 360° dehydration.
* Intelligent Auto-Humidity Management: Automatically cycles on at 30%–50% RH and shuts down below 25% RH to maintain optimal dryness.
* Print-While-Drying Direct Feed: Multi-port feed holes let you print directly from the dry box into multiple printers or multi-color units.
* Universal Compatibility: Supports 1.75mm, 2.85mm, and 3.0mm diameter spools across all open-source and proprietary FDM printers.
* Triple-Safe Protection: Hardware thermal fuse, software overheat alerts, and self-limiting PTC technology ensure complete workshop safety.
* Large Digital Touch Display: Intuitive controls show real-time temperature, target temperature, timer, and relative humidity (RH%).
Technical Specifications:
* Brand: SUNLU
* Model: S4 Filament Dryer
* MPN: DCUS-FD-S4-BK-US
* Color: Black
* Capacity: Up to 4 x 1kg Spools
* Max Temperature: 70°C (158°F)
* Heating Power: 350W PTC
* Internal Fans: 3 Convective Air Fans
* Compatible Filaments: PLA, PETG, TPU, ABS, Nylon, PC, ASA (1.75mm / 2.85mm / 3.0mm)
* Internal Dimensions: 450 × 210 × 211 mm
* External Dimensions: 18.03" L × 8.58" W × 12.28" H
* Power Input: AC 110V–120V (Standard US 3-prong plug)
What’s Included:
* 1 x SUNLU S4 4-Spool Filament Dryer Chamber (Black)
* 1 x Power Adapter & US Cable
* PTFE Filament Guide Tubing & Couplers
* User Manual & Operating Guide
*(Note: Filament spools shown in product photos are for illustrative demonstration only and are not included).*
