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 a sensational customer favorite, and we hope you like it just as much.
Inventory Last Updated: Oct 04, 2025
Inventory Last Updated: Oct 04, 2025
