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.

Growth Technology

Bluelab pH Soil Pen

The Bluelab Soil pH Pen provides a pH and temperature reading of soils and media, indicating that the right nutrients will be made available to the plants.

In soils or growing media, pH strongly influences the availability of the microorganisms to plants. Now the pH levels can closely and easily monitored and adjusted for optimum plant health and performance.

It will also measure solutions too…


  • Direct pH and temperature measurements into soils/media
  • Backlit LCD display
  • Hold reading function
  • Integrated storage cap/dibber
  • Successful pH calibration indicator
  • Low battery indicator
  • Fully waterproof
  • Auto off function
  • Selectable units for °C & °F
  • Automatic temperature compensation


bluelab 1 year

Why is measuring pH vital to the success of your crop?
Plants get nutrition from minerals but can only get all the minerals needed if certain conditions are right. A key thing that affects food uptake is whether the soil or media is acid or alkaline. This is measured in pH. The clever little soil pH pen ensures the optimum pH reading is maintained, allowing nutrients to be available to the plants. Once the pH has been measured using the Bluelab Soil pH Pen and plants can get at the food, it then needs to be measured how much food is available. This is referred to as conductivity and is measured in either ppm or EC – this is where the Bluelab EC Pen or ppm pen comes in. The Bluelab pen range has been specially developed as an affordable and effective option for hobby or small scale growers.

Plant Lifecycle

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