Bluelab Meters and Monitors

Understanding the nutrient solution is an important part of successful growing. Growth Technology’s accurate range of Bluelab meters and testing equipment make this task quick and easy.

Bluelab pH Pen

The ultimate handy solution for measuring pH!

Plants get their nutrition from minerals but they can only get all the right minerals they need if certain conditions are right.

A key factor that affects food uptake is whether the solution is acid or alkaline. This is measured in pH.

The Bluelab pH Pen is the latest innovation for hand-held meters. It provides a compact, quick and handy way to manage the success of crops, to ensure maximum uptake of nutrients. Teamed with the Bluelab EC Pen or Bluelab ppm Pen, it is a handy, convenient and accurate system for ensuring optimum plant growth and health.


  • Measures pH and temperature
  • Selectable units for °C & °F
  • Backlit LCD display
  • Double junction probe (not replaceable)
  • Successful pH calibration indicator
  • Hold function
  • Low battery warning
  • Fully waterproof
  • Auto off function
  • Automatic temperature compensation


bluelab 1 year


This official instruction video shows how to hydrate, use and calibrate a Bluelab pH Pen before the first use. Tips for storage and care of the pH pen are included at the end of the video.

Plant Lifecycle

Early Grow Grow Bloom

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