A 50 mL storage solution for the pH electrode found in Vinmetrica’s SC-200 & SC-300 kits. Keeps your pH electrode safe and prevents it from drying out. A well stored electrode lasts much longer! Just pour it into the pH Electrode bottle that is attached to the pH electrode whenever the level gets too low (or if it spills). We recommend replacing the solution in your pH electrode storage solution cap once a year.