{"product_id":"s4-pro-dual-zone-3d-printer-filament-dryer","title":"SUNLU S4 Pro Dual-Zone 3D Printer Filament Dryer, 4-Spool, 380W, 85°C","description":"\u003ch3\u003eDual-Zone Intelligence for Drying, Annealing, and Humidity Control\u003c\/h3\u003e\u003cp\u003eMoisture-sensitive filament can cause stringing, bubbles, rough surfaces, and inconsistent extrusion. The SUNLU S4 Pro is designed to prepare and manage multiple materials with two thermally separated chambers and independent 45-85°C temperature control. An insulated center partition reduces interference between the left and right zones, allowing different filament types to run under separate drying settings simultaneously.\u003c\/p\u003e\u003cp\u003eThree operating modes support everyday printing and more advanced maker workflows. M01 provides timed drying for routine filament preparation. M02 maintains a controlled environment of 70-85°C for compatible functional prints that require post-print annealing. M03 provides automatic humidity management: set an activation threshold between 30% and 50% RH, and the dryer starts heating when chamber humidity reaches the selected level, then stops when humidity falls to 25%.\u003c\/p\u003e\u003cp\u003eThe S4 Pro holds up to four 1 kg spools, with space for 2 kg of filament on each side. It supports 1.75, 2.85, and 3.00 mm filament and works with a broad range of materials, including PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC, and Nylon. Filament can remain in the dryer during printing, helping reduce moisture exposure throughout longer jobs.\u003c\/p\u003e\u003cp\u003eA 380W PTC heater balances heating efficiency with controlled operation, while the touchscreen provides centralized control of both chambers. Designed for multi-material printing, prototyping, print farms, classrooms, and maker workshops, the S4 Pro helps keep more filament prepared and ready for the next project.\u003c\/p\u003e\u003cp\u003eFor drying and annealing, always follow the filament or printed-material manufacturer's recommended temperature and duration. Confirm that the spool, printed part, and any installed components can safely withstand the selected chamber temperature.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_8.webp?v=1786589559\" alt=\"SainSmart and SUNLU S4 Pro filament dryer beside a 3D printer\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_10.webp?v=1786589559\" alt=\"SUNLU S4 Pro feature overview showing annealing, dual controls, humidity control, and 380 watt heating\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_12.webp?v=1786589559\" alt=\"SUNLU S4 Pro annealing comparison chart with temperature and duration settings\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_15.webp?v=1786589559\" alt=\"Comparison of smooth prints from dried PLA filament and stringing from moist PLA\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_16.webp?v=1786589559\" alt=\"SUNLU S4 Pro filament dryer showing moisture-related print defects it helps prevent\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_18.webp?v=1786589559\" alt=\"SUNLU S4 Pro compatible filament diameters and supported engineering materials\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_20.webp?v=1786589559\" alt=\"SUNLU S4 Pro drying chamber dimensions and package contents\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_22.webp?v=1786589559\" alt=\"SUNLU S4 Pro compatibility with common one kilogram filament spools\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_24.webp?v=1786589559\" alt=\"SUNLU S4 Pro for drying engineering-grade filament used in functional printed parts\"\u003e\u003c\/p\u003e","brand":"SainSmart","offers":[{"title":"USA","offer_id":46405075238991,"sku":"101-91F-S4P-A","price":125.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1978\/9859\/files\/101-91F-S4P-A_1.webp?v=1786589559","url":"https:\/\/www.sainsmart.com\/products\/s4-pro-dual-zone-3d-printer-filament-dryer","provider":"SainSmart.com","version":"1.0","type":"link"}