Blue Lab, pH probe, in-line

UltimateGardener
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$273.60
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A replacement double-junction pH probe for Bluelab Guardian Monitor
The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that test the pH value of a solution.
 The Bluelab pH Probe has a double junction reference which provides a longer life than many other pH probes and is a gel filled non-refillable probe, so apart from cleaning is maintenance free.
 
Replace only the pH probe, not the whole meter!