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I've had a lot of experience with pH between monitoring my own levels to deal with a medical condition as well as taking care of fish tanks. I fully expected to calibrate this meter when it came in, but I decided to test it against two other methods - liquid chemical test and dip sticks (which are a brand I'm familiar with and trust). The meter read withing ~0.1 of what I could estimate from either of those methods, which is pretty damn good. The meters accuracy is likely higher than that, but that is more than enough accuracy for my needs so I'm saving the calibration packets for later when it's really needed.One thing that surprised me is that this meter does actually feel like more work to use than the test strips, and about the same, hassle-wise, as the chemical test. I expected this meter to be so simple and easy, and it is... but when you account for proper cleanup care it's more work than the dip sticks. I can't fault the meter for this though, so no stars lost for that - it only makes sense and I guess I was just being naive.However, this meter does win big on saving money over the strip method, and is much less ambiguous /more accurate! So it might be worth the extra cleanup / maintenance. It's hard to find strips that are reliable and easy to read accurately, so this takes out that bit of hassle - but if you're used to a strip brand you might find, as I did, that the strips are easier and faster (albeit less accurate). Again, this is no fault of the meter - of course if you dip this is fish tank water or your own urine you will need to thoroughly clean it afterwards!I suggest you buy some small glasses to use for test vials and clean up, as 'Dixie' cups and the like get expensive! Here's my workflow:1. Collect sample is small glass (fish water, urine, tap water, whatever you're testing - just ALWAYS use a sample and don't dip directly in, say, the fish tank).2. get another *two* small glasses of distilled/filtered water ready (I like to keep a bottle of distilled water with my test supplies/meter)3. lay down a couple of layers of paper towels (lint free wipes are better if you can spare them)4. turn on the meter, and wait for it to reach zero for a few seconds5. dip it in to a depth of about 1 inch of sample fluid, waiting for the reading to stabilize before removing it6. lay the meter on the paper towels and log your data7. repeat 4-6 one or two more times and average the readings (optional, but recommended*)8. dip the meter in to one of the distilled water glasses just a bit deeper than you went for your sample, lift and repeat a few times holding it at slightly different angles to make sure all source liquid is rinsed away9. repeat step 8 in the other, still clean, glass of distilled water.10. Gently wipe the outside of the meter dry with lint-free wipes (do not try to dry anything else, only the outside)11. dispose of liquids clean up glasses, and pack your kit away - you're all done.Now, this may seem like a lot, but it's not, it just seems that way when you break something down in to this much detail - that said, it is just over twice as many steps as using the pH test strips! So keep that in mind. Do you need accuracy? Do you need to test a lot and want to avoid buying strips so often? If so then this is well worth it - as it's just a routine that will take no more than two minutes once you get it down!Only time will tell if this cheap little meter can hold it's accuracy & linearity to an acceptable degree, but if it even lasts a year I'll be very happy and will have saved money versus buying a years worth of test strips in a brand that I trust. All my ratings and comments here are within the context of realizing that this is a dirt cheap meter - it isn't the most accurate device available, but you likely don't need the most accurate device, and this is probably the best deal for many folks, including myself! You can't expect it to compare with a $200 pH meter, and I think this meter simply serves the purpose of replacing test strips and similarly cheap, easy & inaccurate tests - it is in this context that it shines bright! I hope this helps someone make an informed decision!

Your browser does not support HTML5 video.  First off, dont mind the googly eyes in the pictures...my daughter and I went through a phase. I ordered these out of nothing more than curiosity after my fiance and daughter both spent two days vomiting after drinking the tap water in our apartment (we have only used bottled water or purified filtered water for drinking and cooking since). The TDS reader seemed accurate and was always reading the same as the TDS reader that came with my filter pitcher. The TDS reader was easy to set up, easy to read and easy to understand. The PH reader was a bit more complicated as you have to mix sollutions to calibrate it and they have to be mixed with distilled water at specific temperatures and it was quite the process, albeit somewhat thrilling. Also, you have to be sure to dry the probe jn the PH reader with a specific type of paper so it doesnt collect buildup over time. But these readers are both pretty nice to have on hand in case something is funky or off with our water again and we absolutely have to use tap water. Ive had them for almost a year, only had to use them a handful of times but anytime i do, they exceed my expectations and are still in great shape. Im sire someone with more knowledge on the subject could get more use out of them, but I had to do quite a bit of research to use them the simple ways i did and be able to understand what exactly my findings meant.

Although the water in our community well gets tested, we do not always see the results in a timely manner. I recently we received a letter about past tests not being as they should. That caused enough concern for us to test the water ourselves. This test we chose helped us do just that. It was easy to understand the instructions and easy to perform the test. Even though the last newsletter indicated that it was improving, the test we performed showed about the same results. A second test we performed was on the filtered water from our refrigerator. We were relieved to no it was worth the filters for drinking and cooking. Also, this tester really put our minds at ease.

Starts out high and steady drops down on the pH meter....doesn't seem to matter what water I put it in...I can sit and wait for it to drop to the proper pH reading...really have no idea if it reads accurate since it never sits still long enough to believe it is reading proper...ppm meter is good, but PHeter...I don't trust it...I went ahead and started using RO water in my plants so I don't have to bother with pH...I wish it would pull a reading and display it, but no...it's all over the place, and now it is just sitting in a junk drawer....

We installed a water softener and wanted to be able to set the regeneration cycle based on the hardness which we can now measure at will. The pH tester is useful for testing the pool water.

I know I have hard water, but I didn't know the mineral content or pH until I got these testers. I need to be able to control conditions for optimal growth of greens and small fruiting plants grown using hydroponics.There is a procedure for calibrating pH tester that is moderately involved, but it is worth doing if you care about the pH of the environment.This is the first time I've used devices like this, so I didn't know what to expect. The process has been straightforward.The one caveat from the instruction manual: You are not supposed to let the sensor bulb dry out. So, it makes sense to measure periodically, rince with distilled water, and keep it capped between measures simply to maintain the device.