These LowProfile reference electrodes are useful for many applications and well-suited for use with our Low Volume Cell Series, especially our long neck cell. The low cost of these reference electrodes also make them ideal for nearly any aqueous-based application. These electrodes are permanently sealed with a KCl gel electrolyte, comprised of a mixture of potassium chloride, glycerol, and cellulose gum. Each electrode includes an O-ring. We offer this electrode in several lengths.