Biological Oxygen Demand Incubator comes mounted on castor wheel and is double walled with inner chamber of stainless steel and outer wall made of mild steel sheet that comes powder coated type in nature. The Incubator comes fitted with air circulation fan for maintaining temperature uniformity throughout the chamber. The Incubator has the feature of full view of inner glass door that permits inspection of specimens and lock and key arrangement is provided in the double walled outer door. The Incubator is designed with adjustable shelves, cord and plug to work on 220 to 230 v AC supple and works at temperature ranging from 5 ° C to 60 ° C. The Biological Oxygen Demand Incubator has the feature that temperature is controlled by digital temperature indicator cum controller.