Digital pH Meter Tester Pen With 3 Calibration Powders, 0.01 Accuracy, Pocket Size, LCD Display for Household Drinking, Pool and Aquarium

We are setting up our pool for summer and this was so needed. Easy to set up and comes with everything you need to get started. Simple, clear, and appears to be good quality. I will update as I use it more. Would recommend and may purchase another for my boyfriends aquarium!

The product is very precise and gives an immediate reading, very simple to use and clean.

Terrible Product. PLEASE do not get this product.I was so excited to use this device; however, it had issues early on:1. It wasn't clear how to install the batteries - you have to line up 3 batteries for the device to work2. The display barely worked. The numbers were faint and numbers like 9 looked like 4 and vice versa. It wasn't clear what number you were looking at3. It ***fluctuates**** the ENTIRE time. In the air, in the mixture, etc. It does not stop fluctuating. It just fluctuated between two extreme points (e.g. 3.2 pH and 9.5 pH) over and over again.4. Even using the controls they provided didn't work. The calibrating function would give you about 10 seconds of accuracy where it would suddenly guess the right pH and then you could quickly use it for the liquid you were trying to measure.Overall, it was deeply frustrating and took hours out of my time. It complicated my day, wasted my money, and need to now research a different pH meter. Thanks...

Good value, accurate, dependable readings, easy instructions and excellent customer service.

It worked for 10 months of very little use. Then needed to change battery. The readings appeared to be pretty close to accurate (sometimes reading fluctuate, not too far apart) it may need to calibrate. So far it’s a pretty good tool.

does everything it should do. nice easy display.

I bought this digital pH meter to replace my old bromothymol blue drops for testing the pH in my aquarium. But, the pH value of this tester jumps around wildly, such as from 6.55 to 7.11 or more. The value VERY GRADUALLY stabilizes but takes about 3 minutes or more, which is a long time to wait. The bromothymol blue testing would actually have be quicker. While waiting, the display backlight goes out forcing me to press the Hold button twice to get it back on. The digital tester pH value changes about 4 times a second, which makes it difficult to read since it varies all the time and never settles on a single value. (I see why they added a "Hold" button). After "stabilizing", the value still jumps around, such as from 6.87 to 6.94.Also, the temperature seems off by 2 degrees. This digital meter shows temperature of 75.9 F, whereas my glass thermometer shows 78. And my crude adhesive strip thermometer shows 78-80 (closer to 78). Luckily I don't need this device for temperature, only pH.On a positive note, I have seen the tester displays pH values down to 4. Whereas the bromothymol blue testing only indicates pH values from 6.2 to 7.4. The digital tester also has a nice display with a green backlight.I have been using this digital pH tester for about a year. Waiting for the pH value to stabilize is very annoying, but I appreciate the wide range of pH values it can measure.Following are some suggestions for the company and their engineers:1) Please use a running average to smooth out the pH value the device displays. There's no use in seeing a value immediately change from 6.55 to 7.11. I would prefer that it displays a slowly changing pH value, blink the value while it is changing and has not stabilized, and then stop the blinking when the value stabilizes to about 0.1 pH.2) I do not see any use in displaying pH values down to 0.01 pH. This tester never stabilizes to an accuracy of 0.01 so what's the point of displaying it. I would be happy to see a pH accuracy of 0.1 as long as it stabilizes quickly.3) Please make the green backlight stay on continuously.4) Do not change the pH values 4 times a second, at that rate it is difficult to read any one value. One or two changes per second would be sufficient.5) Improve the accuracy of the temperature. By displaying temperature down to 0.1 F you are implying that is also the accuracy. But in my experience the accuracy isn't even 1 degree.

Nice display and easy to read and use. Great buy!