Programmable 13.75L natural convection oven with high accuracy control at high temperature range from 300°C to 700°C. Equipped with high operability temperature controller. Can be used as constant temperature oven, drying oven, and electric furnace for ashing, sintering, etc. as unit is suitable for each of these three functions. Temperature, measured temperature and overheat prevention temperature can be digitally set by operation menu and ?/? keys. Easy programmable operation, fixed temperature, quick auto stop, auto stop and auto start.