The CYSI CY-M1200-12L Laboratory 1200°C High Temperature Muffle Furnace combines a 12-litre high-purity alumina polycrystalline fibre chamber with a 30-segment Yudian PID temperature controller, delivering precise, repeatable thermal processing for sintering, ashing, calcination, and metal annealing. Three-sided heating (left, right, and upper) and a double-layer forced air-cooled shell maintain excellent temperature field uniformity and an outer surface temperature below 60°C for operator safety.