A replacement probe for Bluelab Combo and pH Meters as well as the Bluelab Guardian Monitor.
The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that test the pH value of a solution.
Unfortunately pH Probes do not last forever as they age through normal use and will eventually fail. With good care and use (keeping the probe tip wet and cleaning once a month) you will extend its life.
The Bluelab pH Probe has a double junction reference which provides a longer life than many other pH probes and is a gel filled non-refillable probe, so apart from cleaning is maintenance free.
Replace only the pH probe, not the whole meter!
Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter Questions & Answers
Why do we need to clean the probes on Bluelab instruments?
A clean probe is an accurate probe!
Cleaning is the most important piece of maintenance required on any Bluelab instrument. The probe comes into contact with the solution and relay the reading back to the instrument for it to be displayed. The probe surface is susceptible to being contaminated or being covered in a greasy film that inhibits an exact reading. There are no shortcuts to cleaning the probes. It is already a very simple procedure and it will also ensure your instrument measures it right every time.
Are any of Bluelab’s pH probes suitable for measuring the pH of pure water?
No, not at this stage.
Why do I need to use KCl vs tap water or pure water to hydrate and/or store my pH pen or probe in?
Bluelab pH Probe KCl Storage Solution contains the same mix as the KCl reference found in Bluelab pH probes or pens. When you hydrate or store the pH probe/pen in KCl storage solution, you’re re-vitalising the KCl reference solution inside the pH probe.
If you use tap water to hydrate or store the pH probe/pen, it can change or weaken the reference inside the probe. Simply put, tap water is not as effective as KCl.
De-ionized, RO (Reverse Osmosis), or Distilled water should NEVER be used to store or hydrate the pH probe or pen. Pure water changes the chemistry in the reference, causing the pH probe/pen to die.