The reference electrode is used as a pair with an indication electrode to make a measurement. All types supplied with a 30 in. lead. All reference half-cells have a universal reference pin connector.Help in selecting the correct electrode can be viewed at Electrode Selection GuideHints on Electrode…

RE-5B Ag/AgCl (3M KCl) Reference Electrode with Flexible Connector Legal Information: Product of Bioanalytical Systems, Inc.