pH Pen

R1 950


This product is the ultimate handy solution for measuring pH. It is perfect for quick and easy pH and temperature readings direct from your solution.

The Bluelab pH Pen is the preferred option for hand held pH meters. It provides a compact, quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients.

Team this product with our Bluelab Conductivity Pen and you have a robust, convenient and accurate measurement system.



  • Measures pH and temperature
  • Selectable units for temperature
  • Back-lit LCD display
  • Double junction probe (not replaceable)
  • Successful pH calibration indicator
  • Hold reading function
  • Low battery indicator
  • Fully waterproof
  • Auto-off function
  • Automatic temperature compensation
  • 1 x AAA alkaline battery included


Importance of accurate pH readings

Think of nutrients like a lock and pH is the key. A key factor that affects nutrient uptake for plants is whether your solution is acidic or alkaline which is measured with pH.

Make use of the Probe Care Kit to ensure that your BlueLab tools are well-maintained and reading accurately.


Please Note:

Electrodes need to be calibrated on a regular basis due to the fact that as an electrode ages, its glass changes resistance. This resistance change alters the electrode potential, and therefor, the accuracy of the reading

The following premium calibration solutions are advised for probe calibration; pH 4.0 Calibration Solution and pH 7.0 Calibration Solution.

The following solution is advised for long term probe maintenance: Probe KCL Storage Solution.