When not in use, a pH probe should be stored hydrated in KCl (potassium chloride) storage solution. Keeping the probe hydrated helps maintain the condition of the glass bulb and junction and supports reliable pH measurements.
For Bluelab pH probes, make sure there is enough KCl storage solution in the storage cap to keep both the glass bulb and junction hydrated during storage.
Why do pH probes need to be kept hydrated?
The glass bulb and junction in a pH probe is designed to remain hydrated for optimal performance. If the probe is allowed to dry out, its response can become slow or unreliable.
Correct storage is therefore an important part of pH probe care and maintenance.
What solution should you store a pH probe in?
Bluelab pH probes should be stored using KCl storage solution.
Before storing the probe, rinse it with fresh running water and place the storage cap back on with sufficient KCl solution to keep both the glass bulb and junction hydrated.
Do not allow the probe to dry out between measurements or during longer periods of storage.
Can you store a pH probe in distilled or RO water?
No. Do not store or soak a Bluelab pH probe in distilled, deionised or reverse osmosis (RO) water.
These types of water can damage the chemistry of the glass bulb and shorten the life of the probe. Use KCl storage solution for storage instead.
What should you do if a pH probe has dried out?
If a pH probe has dried out, it may be possible to rehydrate it before use.
Soak the probe in KCl storage solution according to the instructions for your Bluelab product. Once rehydrated, clean and calibrate the probe before taking measurements.
If readings remain slow, unstable or inaccurate after rehydration and calibration, the probe may need further troubleshooting or replacement.
Learn more about cleaning your pH probe.
How do you keep a pH probe ready for accurate measurements?
Good pH probe care comes down to three things: keep it clean, keep it calibrated and keep it hydrated.
Rinse the probe after use, store it in KCl solution and calibrate it regularly. These simple steps help maintain reliable measurements and extend the useful life of your pH probe.
