STORP1 Starter ORP ElectrodeOHAUS Precision Powers the Starter Electrodes 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 Starter bench and portable meters. Ohaus Starter Electrodes Brochure