Chlorine measuring principle

Information on measuring chlorine:
eh.digital/2ZG...
Disinfection with free chlorine is an important step in water and wastewater treatment to destroy pathogens such as bacteria, viruses or fungi. The concentration of free chlorine in a liquid can be measured using the amperometric or photometric measuring principles. This video shows how these measuring principles work.

[@balda1358]

Thank you very much for good explanation of measurement 👍