What is the silver to silver chloride electrode in the reference electrode?

Consists of metallic silver covered with a silver chloride layer immersed in a solution of potassium chloride or hydrochloric acid. Commonly used Ag | AgCl | Cl - said. It is usually prepared by anodizing silver wire or silver plated platinum wire in hydrochloric acid solution. Silver | silver chloride electrode electrode potential and Cl - concentration in the solution and temperature.