APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH AccuracyCarbonfree Certified

I purchased this 2 years ago and now I only had chance to give feedback this time. This device is the most affordable and accurate as it should be. I have RO at home and added remineralization PH+ inline filter and was able to measure the PH+ accurately from RO and my Kangen machine.For $49 it is not expensive to measure water PH level accurately is a best! Do not fall into $10 or $20 device...they are not accurate tool!Thank you! hope my review helps someone outthere looking for accurate device to measure their home water PH

More accurate than my test drops at least, seems well built and designed. Case and detailed instructions and laminated sheet with quick instructions/care is great. Batteries don't die quick another plus. Compared to the other reliable PH meters fair priced. Do not go cheap and get the yellow ones unless you are going to double check it with test drops( even then I don't trust them to be .5 ph accurate)

Kept my plants alive and healthy. Been over a year now. It is accurate and does the job. What else could you ask for out of it?

Was not so easy to calibrate took me a little of retesting to ensure accuracy but I like the case, the little buffer solutions are handy.

Why did you pick this product vs others?:Had hard time seeing color differences on testing pool water using Taylor test kit. Got this hoping it would be more accurate. Have used it for many months now, and am happy I invested in it. It stays calibrated better than I expected, with slight recalibrations needed every few months. Accuracy is very good, and no more guessing which color is closest to test vial on Taylor kit!

Worked exactly how I needed it to. Better then the bluelab pen the came broken TWICE!

I got 1 of these after seeing my friend test my water very quickly with it. I followed the instructions and calibrated but it wasn't testing my water very quickly. Perhaps I didn't watch closely but I don't recall my friend needing to add any storage solution to my water sample to test it. I think he was sticking it directly in his own tanks as well. Our water is VERY hard and the TDS is 450ppm here out the tap and closer to 1200-1500ppm in many of my tanks.When mine kept drifting and not showing a stable/believable number I contacted Apera. They ran me through circles and told me the only way it will work for my water is if I add test solution to each sample. After doing this I still can't say it's working as well as I expected. Basically, the point of this was to save me time and encourage me to do more testing of my water so I can be more informed about my water chemistry but really it just slows me down and at the end doesn't get results as accurate/solid as a liquid API test. :'(The customer service was very uninformed so I don't know that they were deliberately rude, but it came off that way because they not only refused to replace my meter (saying there's nothing wrong with it) but they also made wildly misinformed comments. The person in charge or helping me with the product just wasn't informed enough about the product or water chemistry in general. To my understanding my water has more iron in it than average.So let me make sure I'm explaining this right... Before I had to pour tank water in a tube, add 3 drops of something, shake it, then see the results... now I have to pour tank water in a tube, add 3 drops of something, stir it, then soak my meter in the solution for like a minute to get a stable reading, then weigh that against my super stable liquid-test and find out if it's even accurate? Why not just do the liquid tests?

Con el poco uso que lleva, parece un equipo confiable