Bluelab Replacement pH Probe

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Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter The Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter is easy to clean because of its bullet shaped glass bu lb. Fully waterproof and less fragile than all-glass electrodes because of its tough polypropylene barrel. Gel filled (non-refillable) making it maintenance free and a double junction reference providing longer life! All probes are interchangeable between all Bluelab products. Probe Tips All probes carry a 6 month warranty Proper hydration of pH probes is vital to maintain wick All pH probes eventually need to be replaced—they can only house so much reference solution KCl storage solution is required for optimum probe maintenance RO water will reduce probe life Show more