A replacement probe for Bluelab Combo, pH meters and Guardian monitors. The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that checks the pH of a solution. Unfortunately, pH probes do not last forever as they age and eventually fail with normal use. With good care and use (keeping the probe tip wet and cleaning it once a month), you will extend its lifespan. The Bluelab pH probe features a dual compound reference that offers longer life than many other pH probes and is a gel-filled, non-refillable probe that requires no maintenance other than cleaning. Replace just the pH probe, not the entire meter!Features
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