The Hydropulper is a compact laboratory apparatus designed for high-consistency pulping and defibering of virgin and secondary fibers. It features a 12 L capacity vessel with a minimum working volume of 2 L, variable speed control from 0 to 800 rpm, and pulping consistency ranging from 5% to 35%. The maximum pulping capacity reaches 600 g of bone-dry pulp. Constructed entirely from 316 stainless steel, it includes an 800 W silicone resin heating jacket with a J-type thermocouple and digital temperature controller, enabling precise constant-temperature pulping from ambient to 80°C. With its small footprint, light weight, and user-friendly operation, this hydropulper is widely used in pulp and paper, life sciences, chemistry, medicine, environmental science, food, and pharmaceutical sample preparation. It delivers efficient and stable processing for fiber disintegration, homogenization, and superfine grinding, making it an ideal choice for laboratory fiber treatment and sample preparation.