The factory‑supplied reference electrolyte is saturated KCl; the electrode reference electrolyte can be replaced as needed.

PTFE jacket; the electrode is detachable; glass outer diameter approximately 4 mm; factory‑filled reference electrolyte: 3.5 M KCl.

The salt bridge solution is saturated potassium sulfate.

Glass outer diameters of 4 mm and 6 mm are available.