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

In soils or growing media, pH strongly influences the availability of the microorganisms to plants in the soil. Now you can closely monitor and adjust the pH levels to optimize 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 temperature
Automatic temperature compensation
1 x AAA alkaline battery included