Bluelab Combo Meter pH Replacement Probe

Genuine Replacement pH Probe for the Bluelab Combo Meter

A Combo Meter with a worn pH probe reads slower and drifts more between calibrations, even though the meter body itself is otherwise fine. This genuine Bluelab replacement probe restores the meter's original responsiveness and accuracy, using the same double-junction design as the original probe to reduce reference contamination over its service life.

The probe delivers fast sensor response and remains accurate in nutrient solutions of 0.2 EC and above, matching the working range most hydroponic and greenhouse programs run in.

Key Features & Benefits

• Double-junction probe design — reduces reference contamination for extended probe life.
• Fast sensor response — delivers quick, accurate pH readings for daily nutrient checks.
• Effective at 0.2 EC and above — accurate across common hydroponic and greenhouse nutrient concentrations.
• Genuine Bluelab replacement — built to factory specifications for a guaranteed fit in the Combo Meter.

Who Should Use This

Bluelab Combo Meter owners whose pH probe has reached the end of its service life or whose readings have started to drift are the direct fit for this replacement probe.

About Bluelab Corporation

Bluelab, a New Zealand company with more than three decades in pH measurement, sells this probe as a genuine factory-spec replacement part for its own Combo Meter.

Frequently Asked Questions

Which meter is this probe designed for?

This probe is designed specifically for the Bluelab Combo Meter. It is not intended for other Bluelab meter models.

Why does the double-junction design matter?

A double-junction probe has an extra barrier that reduces contamination of the reference junction. This extends probe life and helps maintain accuracy over more calibration cycles than a single-junction design.

How do I care for this probe once installed?

Store the probe in Bluelab KCl storage solution and rehydrate it monthly. Clean and calibrate it on a regular schedule using Bluelab probe care products to get the most service life from it.

At what EC level does this probe perform accurately?

This probe delivers accurate pH measurements in solutions of 0.2 EC and above. This covers the working range of most hydroponic nutrient programs.