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VIVOSUN

VIVOSUN Digital pH Meter TDS EC Meter for Water 0.01 Accuracy Hydroponics

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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Oct 15
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Color: Yellow+Blue


Features

  • Application: Great for all home and laboratory TDS & pH testing applications including aquariums, swimming pools
  • PH Meter: Full measurement range of pH 0 - 14, reliable and quick readings
  • 3-in-1 TDS Meter: Measurement Range 0-9990ppm, 0-9990s/cm; Accuracy 2%, 0.1- 80.0C, 32.0-176.0F; Note: This meter can't test sea water
  • Features: Comes with protective case; Lightweight, handheld design for portability and convenience
  • Included: PH meter, 3-in-1 TDS meter, 3 calibration buffers

Description

Who are we? Vivosun is the global leader in at-home growing technology & equipment. With over 10 years of demonstrated excellence in the development and production of growing tools, we have established ourselves as a trusted partner for every step in the growing process and for every level of grower. Vivosun's smart grow system enables growers to master the elements for optimal lighting and ventilation to achieve ideal grow results. Founded in California, Vivosun is a leading manufacturer of indoor horticultural equipment. We will help you manage your plants with scientific precision and control all aspects of your grow with high-quality technology and tools including durable growing enclosures;Whether you grow indoors or out, we provide everything you need to grow the highest quality plants in the shortest amount of time. Our mission is to empower growers at all levels and of all types to grow the best of what they love. This Product is protected by Transparency Program, which verifies a product’s authenticity and you can also view rich information about the product you purchased.You can scan it to verify its authenticity with the Transparency app. Tester Combo Digital pH Meter Kit pH Meter 4-in-1 pH Meter 3-in-1 pH Meter 3-in-1 Moisture Meter Nutrients Base A & B

Brand: VIVOSUN


Ph Range: 0-14


Recommended Uses For Product: Aquarium, Home Water, Swimming Pool, Water Test


Unit Count: 2 Count


Manufacturer: VIVOSUN


Brand Name: VIVOSUN


Manufacturer: VIVOSUN


UPC: 615435160962


Item Highlight: ±0.01 pH Accuracy, ATC, Auto Calibration, LCD Display, Hold Function, for Hydroponics Aquarium Pool Drinking, UL Certified


Included Components: Test pH, TDS, EC & Temp Value


Item Weight: 0.1 kg


Model Number: 4336465266


Part Number: 4336465266


Unit Count: 2 Count


Number of Packs: 1


Number of Items: 2


Material Type: Plastic


Sterility Rating: 0-14


Recommended Uses For Product: Aquarium, Home Water, Swimming Pool, Water Test


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • Great value for a reliable meter!
Color: Yellow+Blue
If you’re looking for an affordable way to check pH, TDS, and EC without spending a lot of money, this is a great option. It gives you several useful readings in one device and is much more convenient than buying separate meters. The readings have been consistent for what I need, and the auto-calibration and temperature compensation make it easy to get started without a lot of messing around. The display is easy to read, and having the hold function is a nice bonus. For the price, I really don’t think you need to spend more unless you have a specific reason to buy a higher-end professional meter. This one gives you the important functions at a fraction of the cost. Definitely one of those purchases where you get a lot for your money. ... show more
Reviewed in the United States on August 13, 2026 by UCMeComin
    • Recommend. Much better than the ph strips
Color: Yellow
This product works as advertised. You have to calibrate it first using the provided ph packets but once you do that it is good to go and offers accurate reading. This product assembly and price range makes for a nice introductory ph meter as opposed to a more premium, and also costly, assembly, yet it is still so much better than a manual ph test strip. I would recommend this product to anyone looking for an affordable digital oh tester. I like the vivosun brand and the products they have offered so far. ... show more
Reviewed in the United States on August 25, 2026 by Angela King
    • Affordable pH Meter That Gets the Job Done
Color: Yellow
Review Image by Shire23
Review Image by Shire23
Review Image by Shire23
Item Reviewed: VIVOSUN Digital pH Meter, 0.01pH High Accuracy Pen Type pH Tester for Hydroponics, Household Drinking, Pool and Aquarium, Yellow, UL Certified ℹ️ Summary I picked this up for pH balancing water that I use for my indoor grow tent and it has worked great for that purpose. For $10 at time of order, you’re getting a meter from a reputable brand that won’t break the bank and does exactly what it’s supposed to do. Included in the package are a nice plastic storage case, extra batteries, and a set of pH calibration buffer powders (6.86, 4.00, and 9.18), which was a nice touch. Calibration was quick and easy and I’ve only needed to recalibrate about once every 3-4 weeks. Readings also seem accurate and consistent. My only real complaint is the build quality. It definitely feels made from cheap plastic and while the buttons are clicky, they still feel a little flimsy. Overall though, I’m happy with this purchase and can comfortably recommend it as long as your expectations match the price point. ✅ What I Like - Low-priced. - Gets the job done. - Comes with a decent plastic storage case. - Includes pH calibration buffers (6.86, 4.00, and 9.18). - Comes with an extra set of batteries. - Readings seem accurate and consistent. - Calibration process is simple. ❌ What Could be Better - Build quality could be better. - Feels made from cheap plastic. - Buttons feel a little flimsy despite being clicky. Final Verdict | ⭐️⭐️⭐️⭐️☆ Here is how I rate items: 5 ⭐️ = Completely exceeds expectations. 4 ⭐️ = Works well with minor concerns. 3 ⭐️ = Does the job, nothing special. 2 ⭐️ = Some things work, but lots of issues. 1 ⭐️ = Didn’t work well, not worth it. ... show more
Reviewed in the United States on May 9, 2026 by Shire23
    • Waste of money, results are wildly different measuring same water twice in a row!
Color: Yellow+Blue
I have a scientific grade PH probe that has been in continual use on a 65 gallon discus tank for 6 months and it was time to recalibrate as part of routine maintenance. After 6 months of use, probe had barely drifted. I used PH 4.0 and PH 7.0 calibration fluids. Probe was spot on with the 4.0 and read 7.1 with the 7.0 so it only needed a very minor adjustment to bring it back into perfect calibration. I used this probe as a comparison with the VIVOSUN. The VIVOSUN readings straight out of the box were pretty far off. Measuring the PH 7.0 solution, the VIVOSUN reported 7.6. Measuring the PH 4.0 solution, VIVOSUN reported 3.65. I calibrated the VIVOSUN using the provided powder for all 3 PH solutions provided as this should provide the most accurate readings per the instructions. Immediately after calibration, I poured fresh 4.0 and 7.0 solutions and the VIVOSUN results were at least .5 off in both directions. Poured fresh solution AGAIN (after rinsing probe in RO water) and once again results were way off (but different from the results it just reported from the first fresh solution pour. I then compared with test strips and the test strips matched the results from my scientific probe. In short, do not rely on the pH meter and I would go so far as to say you need to throw it in the trash ASAP. The TDS meter is also flawed. There are 4 modes of display, according to the instructions whichever mode you choose will remain the default until you change it.. (e.g. Power it off today and tomorrow when you power it on, it should default to the mode it was in when it was powered off.). It does not do this. Not only that but in the middle of taking a reading, it will just randomly switch from measuring PPM to EC or from Celsius to Fahrenheit. I don't have anyway to validate the EC or PPM readings but judging by what I can validate, I would not trust it in any way, shape or form. ... show more
Reviewed in the United States on December 18, 2023 by Comatose
    • Appear to work well
Color: Yellow+Blue
Review Image by Jeff K
After reading several reviews on this and other similar models I decided on this two pack PH and TDS. I recently installed a reverse osmosis under kitchen sink with a tds digital display and wanted another way to check its accuracy along with what ph the RO water was putting out. Item arrived quickly and after reading instructions I decided to give it a test. Batteries were already installed and additional batteries were included so that and they both were already calibrated so two pluses from the start. I filled a glass with reverse osmosis water and another from bathroom sink. Tds for bathroom were 107 compared to RO water of 9. This is the same reading my RO system shows so I assume its pretty accurate. Next I tested the PH. Ro water was higher than bath sink water but this units numbers jumped around a bit. Although the numbers did not display steadily i was able to get a good reading and am pleased with the results. For the price I find the two units a great bargain and much better than the water test strips I was using. After my initial tests I highly recommend these products as they appear to be accurate and easy to read. ... show more
Reviewed in the United States on January 9, 2026 by Jeff K
    • Handy, but requires supervising
Color: Yellow
This pH pen is a major upgrade over messy test strips and is super convenient for quick, digital readings. The pocket-sized design and backlit display are great features for hobbyists or light use. That said, manage your expectations: Calibration is essential: You need to calibrate it regularly to keep the readings accurate. Build quality: It feels lightweight and basic, so it's probably best for light duty rather than rough, heavy-duty work. It gets the job done for the price, but it isn't professional-grade equipment. It's a solid, budget-friendly tool as long as you keep up with the maintenance. ... show more
Reviewed in the United States on April 1, 2026 by Ashleigh
    • Always works!
Color: Yellow
Works very well and accurate
Reviewed in the United States on October 2, 2026 by Jennifer Felt
    • Accurate, Reliable, and Great Value pH + TDS Meter Combo!
Color: Yellow+Blue
I recently picked up the **VIVOSUN Digital pH and TDS Meter Kit** and it has quickly become an essential tool in my plant care and hydroponics setup. The **0.01 pH high accuracy** pen-type meter is impressively precise and easy to calibrate. It gives consistent, reliable readings every time I test my nutrient solution or water. The TDS meter is equally solid, with a ±2% readability that helps me monitor nutrient strength accurately. Having both tools in one kit is super convenient — no need to buy them separately. The pens are lightweight, have clear digital displays, and come with everything you need to get started (including calibration buffers for the pH meter). Build quality feels good for the price. The pH probe is responsive, and both meters turn on and shut off automatically to save battery life. They’re compact enough to store neatly and travel well if needed. Since using this kit, I’ve been able to dial in my nutrient mixes much better, which has led to noticeably healthier plant growth and fewer issues with lockout or burn. It’s also great for aquarium owners, pool/spa testing, or anyone who needs precise pH and TDS measurements. If you’re looking for an affordable yet high-accuracy **digital pH and TDS meter kit**, the VIVOSUN combo delivers excellent performance and value. Easy to use and dependable — highly recommended! ... show more
Reviewed in the United States on April 10, 2026 by ProvokaPhoto

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