COD TNT, 0 - 15000 mg/L O 2. COD TNT, 0 - 15000 mg/L O. 2. Would you like to use our Product Configurator tool to configure this product before adding it to your cart? If not, you may add it directly to your basket. Cuvette test (Ø 16 mm) completely equipped with all reagents, optimised for reliable measuring results and easy handling.