A compact and robust handheld solution

Everyday accuracy of the fundamentals

This user-friendly and hardy Bluelab Handheld PH will take measurements in increments of 0.1 ph. And is fully temperature compensated, so you can expect accurate readings every time.

Built for growers

Our products are designed and built for grower environments – not the lab – so you can relax knowing that your pen can withstand the knocks, drops and deep-water plunges that come with everyday growing. In fact, the fully waterproof Bluelab pH Pen is designed to float when it lands up in your reservoir.

Why measure pH and temperature?

Get the fundamentals of growing right, every time

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.

From a water chemistry perspective, pH (potential Hydrogen) plays a pivotal role in making the nutrients in your solution soluble so that they can be accessed by your plants. That’s why 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 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.

Combine it with the Bluelab Conductivity Pen

Create the ultimate Grower’s Toolbox

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 optimize 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?