Bluelab® pH Probe Inline: Replacement Probe for Bluelab Guardian Monitor Connect Inline The Bluelab® pH Probe Inline is a replacement probe for the Guardian Monitor 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! Features Double-junction probe reduces reference contamination, extending longevity 3/4” NPT thread fits inline mounting; use with 1” adapter Fully waterproof - not just water resistant Pressure rating of 7 bar pressure or 100 psi to withstand line pressure and turbulence Liquid flow naturally cleans the flat pH measurement surface Adapted internal structure for mounting in any direction 3-meter cable for measuring in hard-to-reach locations Fast sensor response ensures quick and accurate measurements Effective in solutions of 0.2 EC and above
