The Grainger Approved pH Electrode is a combination electrode designed for general purpose pH measurement. It has a glass body, epoxy body material, gel electrolyte, and a BNC connector. The electrode has a pH range of 0-14 pH, is compatible with aqueous solutions, and has a temperature range of 0-80°C. The electrode has a 12 mm diameter x 120 mm length. It should be stored in pH 4 buffer solution.