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2025 New Dissolved Oxygen Meter kit with Longer Probe Cable!
GIDIGI launches the 2024 new upgraded version of dissolved oxygen content tester. The DO meter is designed with 2 modes (mg/L mode/% mode) with an accuracy of 0.01mg/L/0.1%, and the read is more accurate. The package contains zero oxygen water, electrolyte and membrane cap, which is easy to use!
Digtital Dissolved Oxygen and Temperature Tester
The mg/L mode is for dissolved oxygen concentration (1mg/L=1ppm); the % mode is for dissolved oxygen saturation. Switch modes as you like: short press the MODE button to switch between mg/L mode and % mode, long press the Temp button to switch between ℃ and ℉.
Easy to Use and Calibrate
Automatic Temperature Compensation-The test values are more stable.
Easily obtain accurate oxygen content in the solution.
Used in koi ponds, drinking water analysis, home beer and wine brewing, industrial systems, hydroponic nutrient, fish tank, sewage treatment, wastewater treatment, laboratories, education research and other fields.
J. Lowery
Reviewed in the United States on February 5, 2025
If you are technologically challenged, this is NOT the device for you. If you can’t read and follow highly detailed instructions, this is NOT the device for you .. if you are good at both of these things .. this device IS for you and will make your life exponentially easier if you have a pond like I do!
CountryFam
Reviewed in the United States on February 27, 2025
As far as I can tell, this works great. I've owned my property for four years, but the pond on it is at least 30 years old. I wanted to determine whether my aerator was improving or worsening conditions, and the only way to do that was by testing the oxygen levels. This device worked well for me since my pond is only about 10 feet deep at its deepest point. I couldn’t get the sensor all the way to the bottom, but it was good enough for my needs.Using this device actually takes a bit more effort than I expected. I thought I could just drop it in like a thermometer, but you have to calibrate it first before placing it in the water. It’s not difficult, just more involved than I initially thought. Not a bad thing—just something to be aware of.I don’t have another device to compare the results to, so I’m trusting the readings at face value. But for the price, I think it’s a solid buy. These usually cost a lot more than $70, so I feel like I got a great deal!
Mayi
Reviewed in the United States on January 30, 2025
Results are not accurate.
Tula Holic
Reviewed in the United States on January 22, 2025
I acquired this Gidigi digital Dissolved Oxygen (DO) meter kit primarily to monitor the oxygen levels in my pond, but I may occasionally use it to check the DO in my aquarium as needed. I like that it can display DO in mg/L or % modes. The meter also measures the temperature, which is essential, but it also includes automatic temperature compensation, which is a very nice feature.The kit consists of handheld tester with a detachable 5 ft Probe Cable, and also includes six replaceable membranes, two bottles of electrolyte, and one bottle of calibration solution, all nestled in a disappointingly thin vacuum formed insert in a heavy cardboard box. It comes with a very nice 17-page instruction manual which shows everything you need to know, but I especially appreciated the three short, well-made videos right on the Amazon site clearly showing how to assemble, how to calibrate, and how to use the DO meter.I really like the nice long cable on the probe which makes it easy to take measurements while safely and conveniently holding the actual meter in your other hand. The high quality polarized 4-pin connectors used not only make a secure connection quick and easy, but they look like they will provide a long service life.The biggest negative for me is that the unit requires four LR44 alkaline cells in series. In my experience, LR44s tend have a short life expectancy and are very prone to leaking, especially when compared to more modern lithium chemistry. To mitigate potential damage from leaking batteries, I just remove the batteries between uses and keep them in a small zip lock bag. I would much prefer lithium cells (either rechargeable or disposable) and a more durable case, but as I was unable to find any DO meters in this price class with these features, I did not deduct any stars for this deficiency.Overall, I like this meter. It is low cost and seems well constructed, and I expect it to provide years of reliable water testing service.
Wurm
Reviewed in the United States on January 15, 2025
Scientific diagnostic tools are expensive. This is a very reasonable tool that is accurate enough for most jobs. Excellent for diagnosing fish die-off. Could be used for aquarium hobby.
C. Cox
Reviewed in the United States on April 19, 2025
Fish need dissolved O2. Submerged plants need dissolved CO2. I can augment CO2 in a number of ways, the most straightforward of which is "injecting" it from a pressurized tank. I can make sure that CO2 stays in an acceptable range with a glass bell and color solution. All these devices are readily available on Amazon or at higher end aquarist shops.Unfortunately, over-aerating decreases dissolved CO2, but until I got this instrument, I didn't have a way to make sure I was aerating enough.Anybody who's used to regular testing of aquarium parameters like pH, ammonia, GH and KH will find GIDIGI's DO probe easy to use. Everything needed to calibrate and store the probe comes in the box, and, when the time comes, the brand has extra probe tips and solutions on Amazon for a reasonable price.
Dave & Lisa Inspired2RV
Reviewed in the United States on April 1, 2025
I picked this up to monitor the oxygen levels in a small pond on my property. I’ve had an aerator running for a while and wanted to get a sense of whether it was actually helping or just running up the power bill. This meter did exactly what I needed—it gave me clear readings, and I was able to track changes over time.That said, be prepared to spend a little time setting it up. It’s not quite a “drop it in and go” kind of tool. You’ll need to calibrate it with the included solution first, and there’s a bit of a learning curve if you’ve never used a dissolved oxygen meter before. Thankfully, the instructions are pretty thorough, and the videos on the product page helped a lot.Overall, for the price, this is a great little tool for hobbyists or landowners like me. It may not be lab-grade, but it’s accurate enough for keeping an eye on pond conditions and troubleshooting fish health. I’d buy it again.
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