Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

Can I use the ORP Sensor for Cyclic Voltammetry?

No. None of our ORP sensors can be used for Cyclic Voltammetry.

The Oxidation-Reduction Potential (ORP) Sensor is a two-electrode system that measures the ability of a solution to either release or accept electrons from chemical reactions. The platinum electrode, also known as the working electrode, is where the oxidation-reduction reactions occur. It either serves as an electron donor or an electron acceptor. A voltage is generated which is compared to the reference electrode (Ag/AgCl). An ORP sensor is typically used to measure the oxidizing or reducing potential of a water sample.

Cyclic Voltammetry uses a three-electrode system. A potential is applied to the working electrode where the redox reaction takes place. The second functional electrode is the reference electrode. This electrode serves as a reference standard against which the potentials of the other electrodes present in the cell can be measured. The third electrode is the counter or auxiliary electrode which serves as a source or sink for electrons so that current can be passed from the external circuit through the cell.

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