Unraveling the Mystery

Here’s why it’s important to understand oxidation-reduction potential — and why an ORP meter can be a potent item in an operator’s toolkit.

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,...

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