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Brand: Bluelab

Bluelab Soil pH Pen | Root Zone pH Meter

Bluelab Soil pH Pen | Root Zone pH Meter

SKU: BLU2216

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Availability: Online | Will Call Locations Stock May Vary

The Bluelab Soil pH Pen is a precise root zone pH meter that reads pH and temperature directly in soil, coco, rockwool, and nutrient solution—no messy slurries. Rugged, waterproof, and easy to calibrate, it helps growers prevent lockout and optimize feeding.
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Bluelab Soil pH Pen: Accurate Root Zone pH Meter

Get fast, reliable pH readings right at the roots—no slurries, no guesswork. This compact handheld pen measures pH and temperature directly in soil, coco coir, rockwool, or nutrient solutions to keep your plants in the sweet spot for nutrient uptake.

Benefits of a Soil pH Meter for Growers

A double-junction pH probe delivers accurate readings while resisting contamination, and the backlit display is easy to read in any environment. The simple 2-point calibration with a 30-day reminder maintains accuracy without hassle, while the KCl-filled storage cap/dibber keeps the probe hydrated and ready to go. Waterproof construction lets you move from soil to reservoir confidently, improving consistency across beds, pots, and hydro systems.

How to Use the Bluelab pH Pen in Soil & Hydroponics

Dip or dib right into the root zone for instant pH and temperature data, then adjust your nutrient solution or soil amendments accordingly. Ideal for living soil, coco, rockwool, and recirculating hydro systems, this soil pH meter streamlines diagnostics and helps prevent pH lockout and yield-limiting stress.

Key features:

  • Direct, in-soil pH readings (no slurry) for true root-zone accuracy

  • Double-junction probe and 2-point calibration for stable, repeatable results

  • Waterproof, handheld design moves easily between soil and nutrient solution

  • Bright backlit display; 30-day calibration reminder for simple maintenance

  • KCl storage cap/dibber keeps the probe hydrated and ready for reliable use

Overall rating: 5.0 / 5 from 2 reviews.

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Very high quality Meter. With

"Very high quality Meter. With the ability to calibrate as often as I feel necessary, I am confident that I’m getting an accurate reading every time."

— Paul S. (5/5)

If you want something that

"If you want something that is going to do the job the first time. This would be the one. I have raised garden beds, and I need to keep accurate measurements of the p h in the soil. Blue lab has created this with this pen. Very easy to use, understanding the same thing. Following the directions before using it's definitely needed. I calibrated, mine made sure I had solution in the 22 keep the end tip moist. The ease of using this tool, his hands down one of the best! Now, I don't want to wear my P. H is, at do I need to adjust, the pen will tell me accurately. I've been in a lot of different organic growth shops around my area. And they all speak of the same blue lab, soil p h pen. The only problem I had with that was they were never in stock. Always sold out. That told me this was a tool that I needed. It is a bit pricey, but if you want quality, you need to pay to get that quality. Highly recommended, if you're really growing organically, and you want to keep your soil at the correct p. h. I take good care of this piece. Keep it on my wall mounted. So I can always get to it when needed."

— Leon T. (5/5)

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