Bluelab pH Probe Inline3/4in NPT Thread - Use with 1in AdapterA replaceable double-junction pH probe for your Bluelab Guardian Monitor Connect Inline. Double-junction probe reduces reference contamination, extending longevity. Fully waterproof, fast sensor response ensures quick and easy accurate measurements and a 3 meter cable for measuring in hard to reach locations. Effective in solutions of 0.2 EC and above.
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