bluelab soil ph pen

Bluelab pH Pen Review: the only soil pH meter to buy

For growers who demand precision and reliability, the Bluelab pH Meter is a tool that often comes highly recommended. This professional-grade device is known for its high accuracy and durability. In this review, we’ll explore the features, pros, and cons of this top-tier tool.

The Key Features of the Bluelab pH Meter

The Bluelab pH Pen is an advanced tool designed to provide precise soil pH readings. This portable, hand-held device offers a range of features that make it a favourite among commercial growers. Let’s delve into the key features of the Bluelab pH Pen.

View the Bluelab Soil pH Pen Meter on Amazon

  1. High Accuracy: The Bluelab pH Pen is known for its high level of accuracy. It typically provides readings with an accuracy of ±0.1 pH units, ensuring you can maintain the ideal pH levels for your plants.
  2. Temperature Readings: In addition to measuring pH levels, the Bluelab pH Pen also provides temperature readings. This dual functionality is particularly useful since temperature can affect pH measurement and nutrient uptake in plants.
  3. Backlit Display: The Bluelab pH Pen features a backlit LCD that allows for easy reading of measurements, even in low light conditions. This feature makes the device user-friendly and versatile.
  4. Waterproof: This pen is fully waterproof, allowing for direct immersion in the soil or water without damaging the device. This is a critical feature when measuring pH in wet or damp environments.
  5. Auto-Off Function: To conserve battery life, the Bluelab pH Pen comes equipped with an auto-off feature. The device automatically turns off after a period of inactivity, ensuring the longevity of the battery.
  6. Easy Calibration: The Bluelab pH Pen offers a simple calibration process. Regular calibration ensures your device continues to provide accurate readings over time.
  7. Portable and Compact: The design of the Bluelab pH Pen is compact and lightweight, making it easy to carry around and use across wide areas of land.

Pros and cons of the Bluelab soil pH pen

The Bluelab pH Pen is a powerful tool packed with features that make soil pH measurement a breeze. Like any tool it has its pros and cons. I found the following features worthy of mentioning:

Pros of the Bluelab pH Meter

  1. Precision: If you’re seeking highly accurate pH readings, the Bluelab pH Meter is a top choice. Its high level of precision makes it popular among professional gardeners and commercial growers.
  2. Durability: Made with high-quality materials, this pH meter is designed for longevity. It can endure heavy use, making it a cost-effective investment in the long run.
  3. User-Friendly: Despite its professional-grade features, the Bluelab pH Meter is easy to use. The simple, clear instructions make it accessible for beginners as well.

Cons of the Bluelab pH Meter

  1. Price: The Bluelab pH Meter is more expensive than many other soil pH meters on the market. It might not be the first choice for casual gardeners or those on a tight budget.
  2. Single-Purpose: Unlike some other devices, this pH meter doesn’t measure moisture or light levels. If you need these additional features, you might want to consider a 3-in-1 device.

How to Use the Bluelab pH Meter

  1. Unboxing and Initial Setup: After unboxing the Bluelab pH Meter, install any batteries if required. Make sure all parts of the device are secure and undamaged.
  2. Calibration: Before using the pH meter, it’s important to calibrate it to ensure accurate readings. The Bluelab pH Meter usually comes with pH 4.0 and 7.0 calibration solutions. To calibrate, immerse the probe into the calibration solution and adjust the meter as per the instructions until it reads the correct pH value. Repeat this step with the second calibration solution.
  3. Testing the Soil: Remove the protective cap from the probe. Insert the probe into the soil to the appropriate depth – usually about 2-4 inches or as per the product manual. It’s best to test multiple locations to get an average reading.
  4. Reading the Result: Once the probe is inserted into the soil, give the meter a few moments to provide a reading. The pH level will be displayed on the digital screen.
  5. Cleaning and Storage: After use, clean the probe with distilled water and gently pat it dry. Replace the protective cap. Always store the pH meter in a clean, dry place.

Remember, the Bluelab pH Meter is a sensitive device. Avoid touching the probe tip with hard objects or your fingers, as it can affect the accuracy of the readings. Always refer to the product manual for specific instructions and troubleshooting tips.

View the Bluelab Soil pH Pen Meter on Amazon

Bluelab pH Meter Accuracy vs. Budget pH Meters

One of the defining factors of a quality pH meter is its level of accuracy. The Bluelab pH Meter, a professional-grade tool, is renowned for its precision. In this article, we’ll compare its accuracy to that of budget pH meters.

The Importance of Accuracy

Accuracy in a pH meter is crucial because even a slight deviation from the true pH can impact your plants’ health. For instance, nutrient availability for plants is significantly affected by soil pH. If your pH readings are off, you might adjust your soil incorrectly, leading to nutrient deficiencies or toxicities.

Bluelab pH Meter: A Benchmark for Accuracy

The Bluelab pH Meter is lauded for its precise measurements. It is a tool of choice for professional gardeners and commercial growers who require the highest level of accuracy. This meter usually provides readings with an accuracy of ±0.1 pH units, which is quite impressive.

Budget pH Meters: A Cost-Effective Option

Budget pH meters, like the Sonkir Soil pH Meter or the XLUX Soil pH Meter, are more accessible to growers due to their affordability. They provide a general idea about your soil’s pH, which can be sufficient for non-specialist gardening needs. However, their accuracy tends to be lower than that of premium options like the Bluelab pH Meter, often within ±0.5 pH units.

Accuracy vs. Price: Making the Right Choice

Choosing between a high-accuracy, premium meter and a more affordable, less precise option depends on your needs. If you’re a casual grower or a beginner, a budget pH meter might suffice.

However, if you’re growing plants that require a precise pH, investing in a high-accuracy device like the Bluelab pH Meter may be essential.

While the Bluelab pH Meter delivers superior accuracy, budget pH meters offer a cost-effective solution for less demanding needs. As with any tool, it’s essential to balance cost and functionality with your specific requirements.


The Bluelab pH Meter is a premium tool that stands out for its high accuracy and durability. While it comes with a higher price tag and lacks multiple functionalities, its precision and reliability make it a worthwhile investment for serious growers. For me, it is important that the soil pH reading I take is accurate because all the amendments I make later are based on this information.