Bluelab pH Pen

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£80.99 £89.99


Measures pH and temperature. 

Healthy growing plants, just like humans, need a balanced diet of appropriate nutrients (food).  However, plants can only access these nutrients when the nutrient solution is within a certain pH range.


  • Backlit LCD display
  • Successful pH calibration indicator
  • Hold reading function
  • Accuracy: ± 0.1 pH, ± 1°C / ±2°F
  • Fully waterproof
  • 20 ml single-use Bluelab Solution Sachets included 1 each of pH 7.0 & pH 4.0
  • 1x AAA battery included
  • 1-year guarantee

The pH (potential Hydrogen) plays a pivotal role in making the nutrients in your solution soluble so that they can be accessed by your plants. If your growing solution becomes too acidic or too alkaline, the plants won’t be able to get access to the nutrients they need to grow. The temperature of your growing solution is equally important, too, as having a solution that’s too hot or too cold can affect growth rate and structure.

To help your plants thrive, get the fundamentals right by measuring pH and temperature to ensure that these are always in the optimal range.

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