{"id":295324,"date":"2026-08-30T12:14:10","date_gmt":"2026-08-30T10:14:10","guid":{"rendered":"https:\/\/drain-master.de\/2026\/08\/30\/storing-and-caring-for-a-ph-electrode-the-5-costliest-mistakes\/"},"modified":"2026-08-30T12:14:10","modified_gmt":"2026-08-30T10:14:10","slug":"storing-and-caring-for-a-ph-electrode-the-5-costliest-mistakes","status":"publish","type":"post","link":"https:\/\/drain-master.de\/en\/2026\/08\/30\/storing-and-caring-for-a-ph-electrode-the-5-costliest-mistakes\/","title":{"rendered":"Storing and Caring for a pH Electrode: the 5 Costliest Mistakes"},"content":{"rendered":"
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Most pH electrodes do not break during use, they break between two measurements. Dry in a drawer, parked in distilled water or polished clean with a cloth: three well meant habits, three ways to kill a sensor early.<\/p>\n

What you are actually holding<\/h2>\n

Two delicate parts sit at the bottom of your meter. First the glass membrane<\/strong>: a wafer thin glass bulb whose surface needs a water saturated gel layer to measure at all. Once that layer dries out, the electrode responds sluggishly, drifts, or refuses to calibrate.<\/p>\n

Second the junction<\/strong>: a tiny porous spot in the shaft through which the reference side keeps contact with the sample, usually visible as a lighter dot or ring. If it clogs, the circuit collapses, readings become unstable and wander off even though the glass looks perfect.<\/p>\n

Both parts need the same thing: ions and moisture<\/strong>. That is exactly what a potassium chloride solution provides.<\/p>\n

The most important rule first: never store in distilled water<\/h2>\n

This is the mistake almost everyone makes once, because it feels right. Distilled and demineralised water is ion poor, which means it wants<\/em> to take on ions. Leave an electrode in it and the water pulls electrolyte out of the interior through the junction. The reference side depletes, and what you measure afterwards is slowly drifting numbers with no foundation.<\/p>\n

Tap water is no solution either: it carries hardness minerals and a pH value of its own that changes the membrane over weeks.<\/p>\n

The right answer is a 3 molar potassium chloride solution (3M KCl).<\/strong> It keeps the gel layer moist, the junction clear and the reference side in balance.<\/p>\n