Reference Electrodes STREF2 (Saturated Calomel)

Reference Electrodes

Basic Principle of Reference Electrodes

Reference eletrodes have a stable and well defined electrochemical potential. A measured potential in an electrochemical cell is determined against a defined potential value of a reference electrode. STREF2 is saturated calomel electrode (SCE)(Hg/Hg2Cl2 in saturated KCl) which traditionally is the most widely used electrode. The disadvantage is that it cannot be used above 50°C due to Hg2Cl2 instability. STREF1 is Silver/Silver Chloride (Ag/AgCl in Saturated KCl), which represents another type of reference electrode.

Care and Maintenance

Maintenance of reference electrodes can help avoid stability problems and keep them in proper working condition. Check that the reference electrode compartments are filled with electrolyte solution and the junction is not blocked.