% Looking for an accurate and easy-to-use digital pH meter? Read our candid review of the Ruolan Digital PH Tester Pen to learn more about its benefits, drawbacks, and overall value. Get all the info you need before investing in this device!

Reviewing the Ruolan Digital PH Meter Pen – Notable Benefits & Caveats

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Are you seeking an accurate, easy-to-use pH meter that won’t break the bank? Then look no further than the Ruolan Digital PH Tester Pen! This review will provide an unbiased overview of this affordable and versatile device, so you can decide whether it’s right for your needs. We’ll cover its notable benefits and some minor caveats customers have reported in their reviews. With all this information at hand, you can decide if this pH meter is worth investing in or not. So let’s dive in!


Before buying a suitable pH meter for your hydroponic garden, read our related posts on pH testing and learn more.

Should You Use a PH Test Strip or Digital PH Meter for Hydroponics
How to Keep the PH Level of Each Hydroponic Growing Medium?
How to Measure EC, pH, DO, and Temperature in a Hydroponic System
Why Your pH Meter is Giving You Incorrect Readings and how to Troubleshoot them
A Beginner’s Guide to Buying a Digital pH Meter for Hydroponics


Ruolan Digital PH Tester Pen

The pH meter in question is a device primarily used to measure the acidity or alkalinity of a solution. It finds application in various fields, from hydroponics and soil testing to pool maintenance and aquarium care. Given its wide utility, it’s no surprise that this pH meter has managed to gather mixed user reviews. With a keen focus on customers’ experiences, this review aims to distill the pros and cons of this product, providing you with an unbiased take on whether it’s a worthwhile investment.


  • Affordable: One of the main strengths of this pH meter is its affordability. Priced at just $12, it offers considerable value for money.
  • Calibration Buffers Included: The meter comes with buffer solutions for a 3-point calibration, enhancing its precision and ease of use.
  • Accurate: Customers have reported that the device is reasonably accurate, which is critical in its line of duty. One user confirmed that the meter was only off by a mere 0.05 out of the box.
  • Long-lasting: One reviewer noted that the meter continues to function well even after months of usage, suggesting decent durability.


  • Storage and Calibration Issues: The glass probe may arrive dry, and the instructions don’t offer clear guidance on proper storage. One user suggested keeping the probe in a 6.8 pH buffer solution when not in use to maintain its accuracy. Concerns have been raised about procuring additional calibration powders for future calibrations.
  • Cumbersome Usage: It was reported that the device requires cleaning before and after each use, which some users might find inconvenient.
  • Limited Measurement Range: It was observed that this meter is not suitable for measuring extremely acidic or basic solutions, which might limit its applications in specific scientific contexts.
  • Long Stabilization Time: While it’s still faster than the drop solution, some users found the meter’s stabilization time a bit long.

In conclusion, this pH meter is a decently-priced tool that offers an accessible way to measure pH levels across various uses. Its accuracy and durability seem promising, even if some users find its upkeep slightly cumbersome and its limited pH range constraining for some applications. This product might be a good starting point for those venturing into hydroponics, soil testing, and pool maintenance. However, other options might be more suitable for users requiring extreme pH measurements or those who lack patience for regular device cleaning and care.

It’s evident from the customer experiences shared that purchasing this pH meter can be an enlightening journey in itself. From the thrill of having an efficient tool that simplifies everyday tasks to the lessons learned about proper storage and care of such devices, this pH meter promises to be a helpful companion, albeit with a few caveats. With this in mind, I recommend this pH meter, particularly for beginners and hobbyists in the respective fields.

Checkout the latest price of this pH meter


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