Bluelab pH Pen

Sale price£85.00



This 2-in-1 Bluelab pH Pen will measure the temperature of your solution, as well as the pH reading. Getting your pH right is important to growing, in order to maximise nutrient uptake and give your plants the best chance. Ideal pH sits between 5.5-6.5 for most plants. Temperature can also affect the plant's growth rate, and you should be aiming for between 18-22°C.

This handheld pen gives you a quick and easy way to check both of these measurements, coming with a backlit LCD display for easy reading.


  • Measures pH and temperature
  • Selectable units for temperature
  • Backlit LCD display
  • Double junction probe (not replaceable)
  • Successful pH calibration indicator
  • Hold reading function
  • Low battery indicator
  • Fully waterproof - not just water resistant
  • Auto-off function to extend battery life
  • Automatic temperature compensation for accurate readings everywhere
  • 1 x AAA alkaline battery included
  • 1-year warranty

Combine it with the Bluelab Conductivity Pen

Create the ultimate Grower’s Toolbox

Conductivity and pH are connected. When preparing a new nutrient solution, you'll need to add the appropriate amount of nutrients according to the plants' needs. Once you’ve checked the conductivity (EC or PPM), which confirms whether the nutrient levels are correct, you'll then need to regularly adjust the pH to ensure those nutrients are available to the plant.

After all, nutrients are expensive so it’s important that you always optimise them.

With Bluelab’s Conductivity Pen, you can take measurements of your nutrient solution to ensure that your plants truly flourish.

Want to combine your Bluelab pH Pen with our Conductivity Pen? View the Bluelab Grower’s Toolbox.

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