CVD tube furnace with three heating zones - OTF-1200X-S single temperature zone open-type vacuum tube furnace features a double-layer air-cooled structure. - The surface temperature of the furnace body is kept below 60℃. - The tube furnace with a pumping system is made of high-purity alumina microcrystalline fiber using high-temperature vacuum adsorption. - Imported heating resistance wire program insert extends the high-temperature tube furnace body's service life.