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Compare Reference Electrode

Available Body Types

Full Name of Reference Electrode Formula Chemical Used Description/Notes Koslow Series No. Compare to:
Mercury/ Mercury Oxide Hg/HgO Our standard conc. is 20% KOH

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Mercury (II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO. Safe for use in alkali or fluoride media. All plastic construction. 5088 Lab Battery Probe
Mercury/Mercurous Sulfate Hg/Hg2SO4 Sat. Potassium Sulfate Solution The Hg/Hg2SO4 Reference Electrode is recommended when chloride ion is not desired in the electrolyte.  Has a filling solution of potassium sulfate. 5100P +410 vs. SCE
Mercury/Mercurous Sulfate Hg/HgKO4 Sulfuric Acid Mercury-Mercurous sulfate reference electrodes, has been widely used in the past, in order to measure half-cell potentials in lead-acid batteries. 5100A Lab Probe
Mercury/ Mercury Chloride Or Saturated Calomel Hg2Cl2 Mercury(I) chloride Sat. KCL Solution The universal standard reference.  The Saturated Calomel Electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. 1001 -410 vs. Hg/Hg2SO4
Silver/ Silver Chloride Ag/AgCl Silver (I) Chloride Sat. KCL/AgCI The silver chloride electrode is the most commonly used reference electrode for testing cathodic protection corrosion control systems in sea water environments. 1004 -47 vs. SCE
Silver/ Silver Sulfate  Ag/Ag2SO4  Sulfuric acid disilver(I) salt         Saturated potassium sulfate and silver A reproducible and stable electrode potential, situated 38.4 mV positive with respect to that of the Hg/Hg2SO4 couple. The preparation and application of a simple silver/silver sulfate reference electrode for an aqueous solution, which can be used as an alternative in chloride-free systems.  1003  +38 vs. Hg/Hg2SO4
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