Take high purity pH measurements with the highest accuracy and precision using the Thermo Scientific™ Orion™ 2001SC ROSS Combination pH Electrode. Combining pH sensing and reference electrodes, 2001SC provides a fast response for online pH electrodes. The Thermo Scientific Orion 2001SC ROSS Combination pH Electrode is designed to be used in Thermo Scientific™ Orion™ stainless steel flow cell, which holds and positions the electrode for optimal results. This combination electrode uses patented ROSS technology. It has a specially designed flow cell for low conductivity samples and eliminates junction potential problems associated with conventional electrodes.