The Signet 2724-2726 pH and ORP Electrodes features a patented reference electrode design and uses the unique foul-proof patentedDryLoc® connector. The large area PE reference junction and pathway isconstructed to increase the total reference effectiveness and ensureslong service life.The DryLoc® connector with foul-proof gold-plated contacts readily connects the sensor to the mating 2760 preamplifier or the 2750 sensorelectronics. The robust Ryton® threaded sensor body and choice offlat pH, bulb pH, or flat ORP sensing elements provides broad range ofchemical compatibility for a wide variety of applications.