4 in 1 Digital Water Quality Tester - TDS/EC/Temperature（°C/°F）TDS Meter | 0-9999 ppm | Accurate and Professional for Drinking Water, Hydroponics, Aquariums, RO Systems, Pool （2025 NEW）
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- – 4-month term
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- – Instant approval decision
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Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Features
- Reliable Accuracy Our TDS Meter 4-in-1 Digital water tester combines a high-performance smart chip with a rugged titanium probe for fast, consistent results. Perfect for drinking water, aquariums, tap water, and more - trust every drop
- 4-in-1 Water Quality Tester Switch between TDS, EC, and F / C with one tap. Get instant, accurate readings for tap water, drinking water, or hydroponics anytime, anywhere
- Smart Color Alerts & Big-Screen Clarity Our profrssional water hardness tester features an extra-large LCD with dual-backlit colors for instant, day-or-night readings.Red backlight = Non-potable water warning (>40+ ppm) , Green backlight = Safe for direct drinking (<40 ppm)
- Long-Lasting Power With an efficient 3V (CR2032) coin cell battery (easy to replace) and smart auto-shutoff, our tester runs 2x longer than standard 1.5V models. Just 1 battery lasts 12+ monthseven with daily use!
- Durable & Reliable Design TDS Meter 4-in-1 Water Tester Features a tough ABS outer shell with comfy non-slip grips for easy handling. The advanced dual-core processor inside gives you fast, ultra-precise readings every time
- Worry-Free Support Enjoy a 2-year warranty with 18-hour/day, 7-day/week customer service. Got questions ? Our team is always ready to assist!
- Product List Body x1, Built-in Battery x1, Operation Manual x1, Outer Packaging x1
Product Dimensions: 4.1 x 1.18 x 0.59 inches
Item Weight: 1.76 ounces
Manufacturer: EKOOTIMO
Item model number: a4
Batteries: 1 CR2032 batteries required. (included)
Date First Available: April 16, 2025
Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
It works and easy to use! I bought RO water so l wanted to check it. RO water is 7, Brita is 88, tap water 189! We live in hard water state. It’s not expensive so value for the money!
Reviewed in the United States on March 25, 2026 by Miisan24
Cheap price but works good
Reviewed in the United States on March 22, 2026 by Jimmy stum
Accurate and easy to use.
Reviewed in the United States on April 8, 2026 by M. A. Kelley
Works pretty good
Reviewed in the United States on January 24, 2026 by Ldub
The 4-in-1 Digital Water Quality Tester is easy to use and gives quick, accurate readings for TDS, EC, and temperature in both °C and °F. It’s great for testing drinking water, in which I purchased it for. The screen is clear and color-coded, making it simple to understand the results. It’s compact, lightweight, and a helpful tool for anyone wanting to monitor water quality at home. Overall, a great value for peace of mind about the water you use. After using it at home, made me even happier that I don't drink household water and use bottled water for everything. I have stopped using the filtered water from the refrigerator and ice because it made me realize that isn't the best water quality either, which is very concerning. Now I take this with me everywhere.
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Reviewed in the United States on July 20, 2025 by Kathyann M.
I’m so truly happy with this purchase I purchased 5 different versions of water and collected different top water as well. And I was stunned by the results I was like a child in a mad scientist experiment ( I’m a grandmother of 12) but call my kids and ran tests in the waters they ask where I got it? I didn’t had a chance to answer my daughter screams AMAZON!!!! I already ordered mine for camping!!!! That was my afternoon 🤭🤪🤣🤣🤣it’s so worth it.tku
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Reviewed in the United States on March 26, 2026 by omi
TDS seems to be accurate. Temperature shows as around 10 degrees cooler than actual temperature.
Reviewed in the United States on April 10, 2026 by josh
This product is not my favorite tool around the house. Talk about easy to use and the readings are done in an instant. Extremely fast testing and very acccurate quality results. Worth every penny. I even have had family members call me to test their tap water to see if they need to buy a water filter or change brands of the water filter.
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Reviewed in the United States on November 18, 2025 by Troy Guillory