HM Digital PH-STOR pH Electrode Storage Solution

Storage Solution Refill That Keeps pH Electrodes Ready

A pH electrode left dry between uses can lose accuracy or stop responding altogether, which is why most pH meters store the sensing tip in a moist sponge inside the cap. PH-STOR is the refill solution for that sponge, compatible with HM Digital's PH-200 and PH-80 as well as other brands of pH meters.

When the sponge in your storage cap runs dry, add PH-STOR to bring it back to a moist (not soaking wet) condition, keeping the electrode ready for its next use.

Key Features & Benefits

• Keeps electrodes from drying out — maintains the moist storage condition a pH electrode needs between readings.
• Cross-brand compatibility — works with HM Digital's PH-200 and PH-80, plus other brands of pH meters.
• Simple refill process — add solution directly to the storage cap's sponge, no disassembly required.
• Supports longer electrode life — proper storage habits help maintain accuracy and extend the electrode's usable life.

Who Should Use This Storage Solution

Owners of HM Digital PH-200, PH-80, or other brands of pH meters who want to keep their electrode properly stored and ready between testing sessions.

About HM Digital

HM Digital rounds out its pH meter line with maintenance products like PH-STOR, aimed at keeping the electrodes in PH-200, PH-80, and comparable meters from other brands in working condition.

Frequently Asked Questions

What meters is PH-STOR compatible with?

It works with HM Digital's PH-200 and PH-80, as well as other brands of pH meters that use a moist-sponge storage cap. Check that your meter's cap uses the same sponge-based storage design before relying on this refill.

Why does my electrode need storage solution?

Keeping the sensing tip in a moist environment between uses helps prevent it from drying out, which can otherwise degrade accuracy or response time. A dried-out electrode often needs a lengthy re-hydration period before it reads reliably again.

How wet should the sponge be?

Moist, not soaking wet. Oversaturating the sponge doesn't improve storage and can lead to solution leaking out of the cap.

When should I refill the storage cap?

Check the sponge whenever you store the meter. If it feels dry or the electrode tip looks crusted, add PH-STOR before returning the meter to storage.