Apera InstrumentsAI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH AccuracyCarbonfree Certified

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)

The media could not be loaded. The APERA INSTRUMENTS AI209 PH20 is a fantastic pH tester kit! Its ±0.1 pH accuracy ensures reliable results, and it's easy to use. What truly sets this product apart is the exceptional customer service. When my original unit had an issue, they replaced it promptly with an upgraded model—for free! The new unit works flawlessly. Pro tip: Use soaking solution regularly for improved accuracy and reduced need for calibration. Highly recommend both the product and the company!Tips: Buy extra soaking solution as you will need it to make the product last longer.Keep probe upright as it makes it last longer. Cheers.

“I couldn’t be happier with this purchase! The quality is outstanding, and it’s clear a lot of thought went into the design and functionality. This product has exceeded my expectations in every way, offering a perfect balance of performance, durability, and style.What truly sets this product apart is how well it delivers on its promises. It’s incredibly easy to use, and you can tell it’s built to last. Whether you’re looking for something reliable for everyday use or a high-performing option for special occasions, this is it.On top of all that, the value for the price is unbeatable. It feels like a premium product without the hefty price tag. If you’re on the fence about getting this, don’t hesitate—trust me, you won’t regret it. This is one of those rare finds that ticks every box!”

I bought this tester mainly to verify two cheaper ones I had already. I was just not confident the ones I was using were giving me accurate readings. When I tested them with calibration solution they both read slightly off one being higher and one lower. So I decided to spend the money on a higher end model.The Apera model seems to work very well and when tested in calibration solution is usually spot on. It has a nice LCD display which is easy to read during normal operation and is much quicker at determining the PH level versus the cheaper ones where you need to wait a while for them to stabilize and typically have much smaller and darker displays. That is the good news, however, the calibration procedure is a bit clunky compared to even the other cheaper ones I have. Partly due to the instructions which are very poorly written, hard to follow and provide contradictory information when it comes to things like storing the device. I understand it was made in China but for gosh sake, hire someone who knows how to speak and write in English to design the manual so it makes sense.In my application PH is very important so having more than one tester is not a bad thing. But it I had to pick just one and price was not an issue....then yes, I would chose the Apera model, but by a very small margin. Mainly because it appears to be a higher quality, well made device - even though the included instructions and funky calibration procedure hold it back from a five star rating.But in the end it is only slightly more accurate then the $10-$15 ones I already have. If the accuracy of the PH reading is that important to you and you want the best and do not care about spending $50, then the Apera is a fine choice. But if you are on a budget and are using a tester to check the PH of say swimming pool water, a cheaper model will work just fine. I would recommend getting two cheaper units from different manufacturers so you can check them against one another. You will spend about half of what it cost for the Apera. And as long as you occasionally test and re-calibrate them, you are better off with two cheaper models than the one more expensive one that does the same thing.

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

Works really well. I got tired of using the test strips and the droplets, so I broke down and purchased this. If you have a salt water pool and have to frequently test your water, this makes testing ph levels fast and easy. After I calibrated it and compared the test results with the other testing methods, I haven’t looked back.