Digital Water Testing Kit - Ruolan Lab pH Meter, TDS and PPM Tester for Hydroponics and Water Analysis Review

Expressing my initial impressions.Some pros: Turns off by itself without draining batteries Got cons: Not airtight, if dropped into water, floods the board

Poor quality device Pros: Nothing good, defective, waste of money, I do not advise the seller Different cons: The curve came, the buttons were shifted and, accordingly, the electrode itself, too, very quickly unraveled (three weeks)

Here in the reviews it was written that he comes calibrated. No, not calibrated at all. The passport indicates the calibration process with three powders, two are available (but the seller has nothing to do with it, even with Ali it comes with two powders, 92022 is missing). Look at YouTube videos about its calibration and storage (storage is also not easy). When measured directly in the aquarium, it shows some strange values. I collect water from the aquarium into a measuring cup from under…

We dissolve calibration powders in sterile boxes for analysis (in each pharmacy - for a penny) and for a long time we rejoice at a successful purchase

Not very long ago but works very well. I'm new to growing microgreens and the pH meter gives a more accurate reading than dripping the solution into a test tube.

Works fine but I had to order a tds tester that changes color to tell you when the water is safe to drink based on tds. And the tds tester came with no scale on which to base the results, although the information is available on the internet.

I bought this primarily for a pH meter. That is completely dishonest. Compared to litmus drops with distilled water, it differs in several respects. After calibration, the result is the same. Unfortunately, I only found out about this after the damage had occurred.

Bad POS I ever wasted money for 3 days and it is out of calibration. Within a week the batteries died, when I attempted to remove them, they corroded and rusted in place. Of course, they only give you 1 set of buffer solution, so now I'm waiting for an extra solution that I had to buy! Buy a better pen!

We bought about 15 sets I think. Due to the Covid issue we only recently opened the box. We sent them to our staff in Mexico for them to use in the field. 4 blocks did not work and were not calibrated. Now it is more expensive for us to ship them back to return them. We are very disappointed.

Worked great for two months, then suddenly normal tap water shows 3.2 (usually 6.7 at my house). I spent a couple of hours recalibrating this following their instructions and the gauge jumps all over the place when placed in 6.8 water but it doesn't read above 3. some! There is a 90 day exchange guarantee, I am within that period but have not been able to return it. Find another Ph check method, this method is inaccurate and will only cost you money!

I think we bought about 15 sets. Due to the Covid issue we only recently opened the box. We sent them to our staff in Mexico for them to use in the field. 4 blocks did not work and were not calibrated. Now it is more expensive for us to ship them back to return them. We are very disappointed.

Worked great for two months then suddenly shows regular tap water at 3.2 (usually 6.7 in my house). I spent a couple of hours recalibrating this following their instructions and the gauge jumps all over the place when placed in 6.8 water but it doesn't read above 3. some! There is a 90 day exchange guarantee, I am within that period but have not been able to return it. Find another Ph check method, this method is inaccurate and will only cost you money!

When I first used them, water got into them and they stopped working. This seemed very bad as these are water meters. They weren't underwater, they just had a test probe in the water. I've used many gauges over the years and have never come across anything quite like it. The return period is only one month, so by the time I discovered the problem it was already too late to return it. If you buy them, test them as soon as possible so that you can send back the defective ones.