ST260 Starter pH ElectrodeOHAUS Precision Powers the Starter Electrodes The ST260 pH electrode is suitable for use in Tris buffer solution. Backed by our commitment to accurate and precise measurement, the OHAUS Starter Series of electrodes are designed to produce exact results time and time again. The Starter Series includes pH, reference, oxidation reduction potential (ORP), conductivity, dissolved oxygen (DO), and temperature electrodes that can be used in combination with