For determination of low range Chemical Oxygen Demand (COD) by the Reactor Digestion method. It is consists range between 0 - 15000 mg/L.

For determination of low range Chemical Oxygen Demand (COD) by the Reactor Digestion method. It is consists range between 0 - 150 mg/L.

For determination of low range Chemical Oxygen Demand (COD) by the Reactor Digestion method. It is consists range between 0 - 1500 mg/L.