P. L. Tandon & Co. Manufactures Eco-Friendly Automatic B.O.D. Incubator. P. L. Tandon & Co. Is an ISO 9001 2000 certified company, manufacturing laboratory instruments. The Eco-Friendly Automatic B.O.D. Incubator is used for incubation of Biochemical Oxygen demand on water and sewage. It has a triple walled design inside, anodized aluminium or S.S outside mild steel fitted with air circulating fans. It incorporates a full view inner glass door with magnetic gasket offering inspection of samples without disturbing the temperature of cabinet.