The Bluelab Inline pH Probe is a replacement probe for the Guardian Monitor Connect In-Line.
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.
Replace only the pH probe, not the whole meter!
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.
Replace only the pH probe, not the whole meter!
The Bluelab PH Probe Inline for Guardian Monitor is the yin, to your yang. You've found what you're looking for.
Inventory Last Updated: Jul 17, 2025
Inventory Last Updated: Jul 17, 2025
