Overview The Bluelab pH Inline Probe is a replaceable double junction probe designed for use alongside your Bluelab Guardian Monitor Connect. General Information Designed with longevity in mind, the double junction probe is encased in a high pressure housing and utilising high-quality electrical components. Benefits Double junction probe reduces reference contamination Fully waterproof 3/4" NPT thread fits inline mounting with the use of 1" adaptor 3m cable for measuring hard to reach locations Effective in solutions 0.2EC and above Fast sensor provides almost immediate measurements How to Use For best results, please set up in accordance to the manufacturers instructions provided. We strongly recommend that you register your product online upon receipt to activate the warranty.