A pH-electrode station consisting of a base that holds a standard 50 ml Schott bottle and a sleeve for the electrode, that acts as a cap and depth stop.

The base is best printed in PETG for flexibility of the clamps that hold the bottle in place.

The sleeve is designed to be printed with a soft material like TPU or Polypropylene. It slides over 12 mm electrodes and creates two seals around it to prevent the storage solution from evaporating or creeping up the shaft. The sleeve should be positioned so that the electrode is submerged in the solution, but doesn't touch the bottom of the bottle. The sleeve also acts as an insertion guide and caps off the bottle.

This way the electrode can be taken out of the storage solution with one hand, used, and put back safely.

There is also a flexible holder clamp for the electrode, that can attach to the metal support clamps usually found in labs. It's probably very niche, but I included it anyway.