The Oakton WD2700340 Double-Junction Flat Surface Self-Cleaning ORP Probe (CPVC) is for the most difficult ORP applications. Flat surface does not collect suspended solids - fluid flow across the electrode provides a cleaning action that extends electrode life and improves performance. Annular junction reduces reference cell fouling. The electrod has a 10-ft cable and can be used at pressures up to 100 psi. BNC connectors match a variety of meters and controllers.