The spex 100 mL conductivity standard (total dissolved solids as potassium chloride) is mainly used in research facilities and chemical laboratories to conduct wide range of experiments. It is available in sturdy bottle that endures heavy and rigorous usage.

The spex 500 mL conductivity standard (total dissolved solids as potassium chloride) is mainly used in research facilities and chemical laboratories to conduct wide range of experiments. It is available in sturdy bottle that endures heavy and rigorous usage.