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Best pH Meters [ January 2021] – Top 5 Digital Pens Reviewed

Lisa Morgan

5 Best pH Meters: Top Digital Pens of 2021

Checking the acidity and alkalinity levels of your water supply is an essential step to see if it might be the cause of recurring skin irritation, if it’s safe to use tap water for your pet fish’s aquarium, or if it’s suitable to use for your indoor pool. Highly acidic water is definitely not good for your body, nor is the excessive consumption of alkaline water. This is why you need to check your water supply’s pH levels from time to time.

Others might think that pH level testing can only be done inside the lab, but technology has made it possible to test your water supply at home using digital pens. These hassle-free devices provide accurate reading and often comes at an affordable price. Choosing the right one among the long list of products available might be difficult, but definitely not impossible.

We reviewed every digital pen in the market and found five of the most recommended digital pens by experts. These have been tried and tested for their precision and are favored for being an economical choice among expensive ones. Keep reading, and find the best one based on your budget and needs.


1) VIVOSUN pH and TDS Meter Combo

$19.99
$16.99  in stock
1 new from $16.99
2 used from $18.39
Free shipping
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as of September 9, 2020 4:31 am

The VIVOSUN pH and TDS Meter Combo is a compact pH tester that most customers prefer for being an affordable option without losing practicality. Its digital display shows easy-to-read results and is quite straightforward to use, making it a convenient product even for first-time users.


2) KoolaMo Digital PH Meter

$13.99  in stock
1 new from $13.99
Free shipping
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as of September 9, 2020 4:31 am

For easy calibration, the KoolaMo Digital pH Meter is an excellent choice. Measurement is done with only a single touch and provides instant readings for both temperature and pH scale. It’s also our cheapest product on the list so if you’re on a budget, then this multipurpose digital pen is for you.


3) Dr. Meter PH-100V

$31.99  in stock
1 new from $31.99
1 used from $26.85
Free shipping
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Amazon.com
as of September 9, 2020 4:31 am

One of the most recommended items on our list is Dr. Meter PH-100V. Praised for its high accuracy in testing any liquid solution, this pH meter uses an automatic temperature compensation (ATC) function that prevents erroneous readings due to changes in temperature. If you don’t mind spending just a little more for a guaranteed quick and accurate digital pen, then this is the right product for you.


4) Pancellent TDS PH EC Temperature 4 in 1 Kit

$22.17
$21.17  in stock
1 new from $21.17
Free shipping
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Amazon.com
as of September 9, 2020 4:31 am

If you feel you might need more than just a TDS and pH meter, the Pancellent TDS pH EC Temperature 4 in 1 Kit might be the right product for you. Instead of purchasing separate testers in measuring total dissolved solids (TDS), pH levels, electrical conductivity (EC), and temperature, you’ll get them all in a single set with multipurpose devices.


5) 7Pros High Accuracy Pen Type Water Quality Tester

$18.00  in stock
1 new from $18.00
Free shipping
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Amazon.com
as of September 9, 2020 4:31 am

Another customer favorite is the 7Pros High Accuracy Pen Type Water Quality Tester. Recommended for its ease-of-use, this pocket-sized pH tester is a beginner-friendly product that is highly recommended by aquarists to test the pH level of fish tanks and ponds. If you’re looking for a high-quality pH tester with the same performance as its expensive counterparts, then this is certainly a must-have.