The Bluelab Inline pH Probe is a replacement probe for the Guardian Monitor Connect 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!

• 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-metre 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