VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified
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Availability:
In Stock.
Arrives
Sunday, May 24
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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
Brand: VIVOSUN
Ph Range: 0-14
Recommended Uses For Product: Aquarium, Home Water, Swimming Pool, Water Test
Manufacturer: VIVOSUN
UPC:
Brand Name: VIVOSUN
Manufacturer: VIVOSUN
UPC: 615435160962
Model Number: 4336465266
Part Number: 4336465266
Included Components: Test pH, TDS, EC & Temp Value
Item Weight: 0.1 Kilograms
Sterility Rating: 0-14
Material Type: Plastic
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:
Sunday, May 24
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.
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Top Amazon Reviews
Color: Yellow+Blue
My husband originally purchased this set last month so we could keep a closer eye on the water quality for our plants. We are on a well, so having a consistent way to check the water quality is essential. These meters have been surprisingly accurate and very easy to read, which has taken all the guesswork out of our routine. One of my favorite features—especially as someone who isn’t a pH testing expert—is that the two meters are different colors. It sounds small, but having them color-coded makes it so much easier to grab the right one at a glance! In terms of functionality and sturdiness, the pens feel well-made and durable. The caps have a tight seal, which is important for protecting the sensitive electrodes from drying out between uses. The digital screens have great color accuracy and clarity, making the numbers pop even if the lighting in the greenhouse or kitchen isn't perfect. For the price, you get a lot of accuracy and peace of mind.
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Reviewed in the United States on March 25, 2026 by Emily A
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!
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Reviewed in the United States on April 10, 2026 by ProvokaPhoto
Color: Black+White
I like the TDS Meter but the Ph is so slow to get to the actual ph level. I’ve had to leave it in a cup of whatever what I’m measuring and walk away for 30 mins to get a true reading that matched my master API kit.
Reviewed in the United States on May 3, 2026 by Blake Taylor
Color: Yellow+Blue
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.
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Reviewed in the United States on January 9, 2026 by Jeff K
Color: Yellow+Blue
The pH meter ended up being basically useless. I carefully followed all instructions. It took a lot of time and frustration to successfully 3-point calibrate it. After calibration it seemed to be partially accurate but it would take 2+ minutes to provide a reading. Even then, it would start about 2 points above the real reading then slowly keep drifting downwards at a rate of roughly 0.01 per 1-2 seconds. It would never “land” at a reading. After a week of use I gave up on it and just went back to using chemical pH tests because those only take a fraction of the time to get a ballpark reading. The TDS meter was a little better. As I said before I followed all instructions carefully regarding usage and proper storage. For the first month of regular usage (used 1-3 times per week) it worked great and exactly as expected. Then the temperature readings became unreliable. I have other digital thermometers to compare it to and this device was consistently off by about 5-10 degrees fahrenheit which made it useless at that point. The TDS portion of the blue meter seemed to be accurate and mostly worked until the end of the 2nd month. Then it would randomly behave strange. I would test the same sample of water 3+ times over 10 minutes and the ppm reading would fluctuate by 10-40 ppm. Or sometimes I would test two samples of water from my fish tank taken about 24 hours apart. It would read out exactly the same as if the meter was “frozen”. I know that isn’t accurate as the 2nd sample would be taken 24 hours later after a fish feeding and a plant fertilizer dosing. So it’s highly unlikely that it would give an identical reading for the 2nd sample.
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Reviewed in the United States on February 5, 2026 by Josh
Color: Yellow+Blue
pH Pen did not calibrate as sensitively as stated but is close enough to get a vague idea of the pH. Works ok.
Reviewed in the United States on April 1, 2026 by Jason
Color: Yellow+Blue
Excellent , helps me keep the Total Dissolved Solids checked in my Neocaradina shrimp aquarium
Reviewed in the United States on May 5, 2026 by Bill
Color: Yellow+Blue
Very nice good product for testing your TDS. Display was fast. Packaging was very strong and arrived quick. Works better than my other ones. Instructions good. 5 start for me.
Reviewed in the United States on April 3, 2026 by Chef Tucker