Tube test for the determination of Chlorine and Ozone. Precise rapid tests for all kind of water and waste water samples. Time-saving and reliable analysis together with Macherey-Nagel NANOCOLOR photometers. Measuring range: Chlorine (free)-0.05–2.50 mg/L Cl2, Chlorine (total)-0.05–2.50 mg/L Cl2,...