Everyone in the water and wastewater industry knows and measures pH. Conductivity is a concept we all readily grasp. Dissolved oxygen and free chlorine are actual chemicals, so we understand them.But oxidation reduction potential (ORP or redox) is another matter. For most, it's a mystery, and that's a shame because ORP can be used in more applications than any other measurement. Furthermore, the analyzers that measure it are inexpensive and simple. The more you know, the more you will want to use them.What ORP meansORP is mysterious to most because it doesn't measure anything in particular. It is an aggregate
