Ag electrodes are used for the indication of the potentiometric endpoints in precipitation titrations between silver and halide or sulfide ions. A coating on the silver ring may increase the sensitivity of the electrode and can thus reduce the limit of detection. This is why a variety of coated Ag electrodes are commercially available. This bulletin describes how the silver ring of Ag electrodes can be coated with AgCl, AgBr, AgI or Ag2S by electrolysis.