STSURF Starter pH ElectrodeOHAUS Precision Powers the Starter Electrodes The STSURF Starter pH electrode is ideal for measuring pH on flat surfaces such as skin or paper. The flat pH electrode is also ideal for applications where the tip of the electrode may be damaged in the sample container. 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