The 10 Best TDS Meters

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This wiki has been updated 17 times since it was first published in November of 2018. Whether you're maintaining an aquarium, growing a hydroponic garden, or assessing the quality of a home's filtration system, one of these TDS meters will keep you well informed. Designed to measure varying concentrations of dissolved metals, minerals, and salts within liquids, they can help determine whether or not a water source is fit for general use and consumption. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki.

1. Soeks EcoVisor F4

2. Gain Express 6-in-1

3. Jenco EC110B

Editor's Notes

February 01, 2021:

It was a fairly straightforward update, with the vast majority of our previous picks making it through the round. The only option we ended up eliminating, due to availability issues, was the NovoBlue 2-in-1, which we quickly replaced with the Gain Express 6-in-1 — a portable model that comes with a few useful extras, including a wrist strap and rigid storage case.

Depending on what your intentions are with this device, you might also be somebody who’s interested in checking out our rankings for pH testers and soil testers.

November 27, 2018:

Added the Soeks EcoVisor F4 for its multifunctional design and easy-to-use touchscreen interface. The HM Digital DM-1 was one of the few inline options I found that can measure both input solution and output liquids for filtration/purification systems. Also included the Bluelab Guaradian for its dedicated hydroponics applications. The backlit LCD on the HoneForest Tester is capable of flashing both red and green, making alerts easy to tell apart from one another. Finally, added the Thomas Traceable for its chemical-resistant design and large, easy-to-read digits.

4. Apera PC60

5. Bluelab Guardian

6. HM Digital COM-100

7. Thomas Traceable

8. HM Digital DM-1

9. Health Metric Professional

10. HoneForest Tester

Will Rhoda
Last updated by Will Rhoda

After deciding that the pen was mightier than the pliers, Canadian electrical contractor William Rhoda abandoned his career and headed back to college, where he majored in marketing and advertising and won a scholarship along the way to earning a diploma in creative communications. His past career landed him a depth of knowledge in tools and hardware, while his current career schooled him in audio, video and camera equipment. During his leisure time, he’s learned lots about outdoor gear, and years of tiresome backyard maintenance have taught him all about pools and hot tubs. His recreational pursuits include rest, relaxation and revolutionary action, and his roommate’s a hairless cat.

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