The Electric Heating Digester is an essential laboratory apparatus for pulp cooking and delignification research. It simulates the working principle of industrial rotary digesters by continuously rotating the vessel to fully mix raw material with cooking liquor, ensuring uniform heat and chemical distribution. This unit is designed for sulfite, kraft, or soda pulping of various plant fibers, as well as for oxygen bleaching and other pressurized reactions up to 8 Kg/cm². The 15 L vessel and all wetted parts are constructed of 304 stainless steel for excellent corrosion resistance. Advanced brushless signal transmission technology replaces traditional slip rings, eliminating risks of sparking, poor contact, and temperature control failure. Equipped with a 4.5 kW electric heating system, intelligent program controller, and high-efficiency insulation, it delivers precise temperature control (±3°C) and superb reproducibility for process development and fiber research.