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Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Bluelab Soil pH Pen
PENSOILPH

Bluelab Soil pH Pen

The Bluelab Soil pH Pen is purpose-built for direct measurement in soil and substrate, while also offering the versatility to measure nutrient solution.

For growers who want to monitor pH more quickly, it delivers on-the-spot measurements directly at the root zone, making routine spot checks faster.

Inspired by proven Bluelab Soil pH Probe technology, the spear-tip probe is purpose-built for easier penetration and improved root-zone contact. It delivers professional-grade pH and temperature measurements across soil, coco, potting mixes, rockwool, other substrates, and nutrient solution.

Product Features:

  • NEW tapered-tip probe inspired by proven Bluelab Soil pH Probe technology
  • Direct pH and temperature measurement
  • Tapered-tip design for improved penetration and root-zone contact
  • Simple two-point pH calibration
  • Automatic Temperature Compensation (ATC)
  • Backlit LCD display with hold-reading function
  • Waterproof design
  • Auto-off function to make the most of battery life
  • KCl-filled storage cap/dibber keeps the pH sensor hydrated when not in use
  • KCl-Keep Plug seals the storage cap/dibber during use to help prevent spills and contamination

  • Product manual
  • Technical specifications

Pair it with Pulse Meter

Bluelab Pulse Multimedia EC/MC Meter

Bluelab Pulse Multimedia EC/MC Meter

Key Benefits

  • Measure pH and temperature directly at the root zone across soil, coco, potting mixes, rockwool and other substrates, as well as solution.
  • Get faster results with no sample preparation, making it easy to spot-check pots, beds and slabs without waiting for lab results.
  • The tapered-tip probe makes penetration easier and helps achieve effective contact with the soil or substrate.
  • Professional-grade performance backed by proven Bluelab technology.
  • Up to 2× faster pH response.*
  • Fibre-reinforced polycarbonate probe body for improved flex resistance.

Backed by trusted Bluelab technology

The Bluelab Soil pH Pen measures pH and temperature directly at the root zone across soil, coco, potting mixes, rockwool and nutrient solution.

Its professional-grade tapered-tip probe allows for easy penetration and effective contact with the growing medium, eliminating the need for slurry preparation.

With up to 2× faster pH response*, growers can get reliable readings sooner, making routine spot checks of pots, beds and slabs quicker and easier.

*Based on internal testing versus previous-generation PENSOILPH units. Response time was measured as the time required to reach within 0.1 pH of a stable reading under tested conditions. Results may vary.

Everything you need to get started

Comes with:
1x Bluelab Soil pH Pen
1x 18 ml / 0.6 fl.oz Single-use Bluelab pH Probe KCl Storage Solution Sachet
1x 18 ml / 0.6 fl.oz Single-use Bluelab pH 7.0 Calibration Solution Sachet
1x 18 ml / 0.6 fl.oz Single-use Bluelab pH 4.0 Calibration Solution Sachet
1x NEW KCl-Keep Plug included
1x AAA alkaline battery
1x Multi-language Getting Started Guide (EN, ES, DE, FR)

1-year limited warranty

Bluelab Soil pH Pen. Built for the root zone

A handheld digital pen for direct pH and temperature measurement in soil, substrate and solution.

Watch Video

The fundamentals of soil growing

All plants need a balanced diet of nutrients (food) in order to grow. However, plants can only access nutrients if the pH (potential Hydrogen) of your growing medium falls within the correct range.

Contrary to popular belief, all growers need to measure pH, regardless of whether you’re growing in soil or in solution. That’s because pH plays an important role in making your nutrients soluble so that they can be absorbed by plants. If your soil is too alkaline or too acidic, your plants won’t be able to get all the nutrients they need. 

Temperature also plays an important role in plant health, influencing nutrient uptake, growth rate and overall development.

Read our Growers Guide to Soil Fundamentals
Young plants growing in soil with a blurred background

Find the right product for your needs

Compare to other Bluelab products

Product name
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Growing method
Parameter
Type
Recommended for
Warranty
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Replaceable pH Probe
Current product
Bluelab Soil pH Pen
Bluelab Soil pH Pen
Soil & Substrate
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Handheld
Home Growers
1 year
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  • It's very durable and waterproof. Love it! Best product.
  • Blue Lab is the best. I get precise readings now.
  • It gives accurate info for optimal nutrient uptake and fastest growth.
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
A
Anonymous
It’s more durable that they claim

I have been using mine a lot more than usual.We currently have an outdoor grow going. It’s very durable and waterproof. Ya know it’s not so clear in the instructions. You unscrew the bottom a little and remove the whole piece including the top part. Just slide it all offs you unscrew it for the suction. It unseals it. Also when you fill it up, stop just below the lines going down on the sides. You don’t have to keep it upright if you fill it right. It’s super water tight, I leave it outside out of sunlight. I float it in water and test water PH. Love it! Best product.
P.S. dip it in your watering can between measurements. Also don’t knock all the top soil into the hole, you will measure the top soil.

D
Daniel E.

Easy to calibrate & work with. Like results to the tenths! We feel much more satisfied with this product over others we’ve tried.

M
MARCUS
Nothing beats Bluelab!

After buying every cheap soil pH meter there is on Amazon, I finally broke open my wallet for the best one out there. Blue Lab is the best. I can check my soil and water’s pH and I get precise readings now. Treat it right and it will last for years to come.

T
Tech H.
Accurate

Works great. Use it for both liquid and soil/soilless mediums.

e
engineer
A company that stands by their product.

I discovered I had an issue with calibration only a couple of weeks over the warranty period and reached out to Bluelab Customer Care. Support immediately got back to me the same day (within hours) and asked me to send more information on my calibration issues. Without any back and forth, within a day they let me know they were going to take care of me. They honored their warranty and immediately sent me a new pen and a printed user guide/grow booklets as well. Bluelab and their customer care are a cut above the rest. Recommended.

G
Grant
Dependable and accurate

Bluelab makes some of the best equipment out there. I’ve used their meters for over 15 years and they have never let me down. It gives accurate info so you can keep plants at optimal nutrient uptake for the best and fastest growth.

c
casey n.
Easy to use and seems to be very accurate.

I use this commercially and it does a great job. Easy to calibrate and easy to use.

J
Jeremy m.
The guessing is over!

This thing lets you know what’s going on with your soil’s pH very quickly. You do have to calibrate it once every 4 to 5 weeks if you use it consistently, but it’s worth the money if you’re on the fence.