OTL1200-S mini tube furnace with resistance wire for heating element, the double shell structure and 30 program temperature control system, phase trigger, silicon control, furnace with alumina polycrystalline fiber material, with temperature field equilibrium, low surface temperature, the temperature rate fast, energy saving, is universities, research institutes, industrial and mining enterprises do high temperature atmosphere sintering, atmosphere reduction, CVD experiment, vacuum annealing with ideal products.