The pH electrode storage cap with compression fitting is only suitable for use with pH electrodes with a 12mm stem diameter. Prolong the life of an electrode with the appropriate hydration maintenance. After using your electrode, rinse off the probe with the recommended cleaner, blot with soft tissue paper, then pour 1cm of HI-70300 storage solution into the plastic storage cap. Place probe tip/bulb into the cap and tighten the threaded collar. Please check before ordering that these will fit your electrode.
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