Thermoreactors are required for the determination of COD, total nitrogen or total phosphorus. They ensure a complete digestion of the sample, as they maintain the necessary high reaction temperature throughout the whole of the defined period. In each of the thermoreactors, the most important temperatures and digestion times are stored in 7, easily selectable digestion programs. Suitable for 16 mm cuvettes. CR 2200 is suitable for anyone who needs to perform routine water analysis tests with small sample amounts, as 7 programs are available for digestion of 12 sample cuvettes at 100, 120, 148 and 150 °C.