About the ORP Sensor

The ORP (oxidation-reduction potential) Sensor measures the ability of a solution to act as an oxidizing agent or reducing agent. ORP electrodes are often used to measure the oxidizing ability of chlorine in swimming pools or to determine when the equivalence point has been reached in an oxidation-reduction reaction. The electrode has two components: a measuring half cell comprised of platinum metal immersed in the solution in which the redox reaction is taking place and a reference half cell (sealed gel-filled Ag/AgCl), to which the platinum half cell is referenced.

The Vernier ORP can measure redox potential in the range of -450 to +1100 mV. Readings toward the positive region of this range indicate a strong oxidizing agent, while readings toward the negative region indicate a strong reducing agent.

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