Does anybody honestly know how accurate the pH readings are? If so, HOW do you know?
1244503
I guess by using a known value, like the calibrations buffers, 4.0 or 7.0. It's like using a calibrated weight to check a scale
1244504
I sure don't! I bought this one and a Sun Master digital and they couldn't read further apart! What we need to find is a calibration solution that works on soil meters, not just water meters.
1244505
This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is Avogadro's number (6.02x10^23) molecules of a substance. This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is... » Read More This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is Avogadro's number (6.02x10^23) molecules of a substance. « Show Less
813296
Great name! Thanks for the question. The ph range is from 6.0-10(in the red) - end padThis test kit is nice and easy, tests for Bacteria, lead, pesticide, nitrates and PH. I have been testing evrey 2-3 months since I am in PA along the fracking belt and recently my township has converted to Philadelphia public water, no more well water. All the best!
1881076
It is not listed on the bottle anywhere, so I stuck my pH strip into the bottle. It came up with 6.25pH.
1048507
The test strip you are using is not accurate/sterile enough to accurately test the PH of water...One thing that everyone should know about these (and other) pH test strips is that they work based on the TDS (total dissolved solids) that are present in the water you are testing. If you are trying to test a true distilled water (with nothing in it, no TDS) the strips won't be effective and I'd recommend you use a test drop for the water sample.
1224051
My filter came with a pH test kit. You can buy them at the drug store. That was never a problem for me. Getting replacement filters is a problem. Otherwisw, I love the filter.
1047196
All of these meters can give wrong readings. Today my Bayer USB told me my sugar was 0.9!! Tested again immediately and got 5.3. I think the Verio is as accurate as the average meter, unless you have a faulty meter.
1282875
I have had no problems with mine. Accurate as far as I have been able to determine.
765826
As far as I know you don't. I have two other oxymeters and have taken overnight tests with professional grade recorders and my meter reads accurate out of the box when cross-referenced with the other meters. It is important, at least for me, to remember I can vary up to 5 points depending on what finger I use with any meter. Anyway, my meter came accurate and didn't need calibrating so I never looked in to it.
216126
You need to have a solution of known PH so you can test your PH metter and calibrate it according to instructions
2228920
I've purchased mine on Feb 2014 and I'm a heavy user of this product. Just recently (a few days ago) i tested the water and it gave me a 8-9ph (the test consists on drops you add to a little bit of water to check the ph, and its color coded: purple bring ph 10 and blue 9 and so on. Mine was blue) you can purchase the filters (pack of 3) for less than $80. Hope this helps
440854
Im not sure what the optimal ph is but, i have 2 clone king machines and i put in water with a ph of 5.6 to 5.8 just like my hydro stuff, and i havent lost 1 clone in 6 batches of clones
369401
I used a pH reagent test liquid against an 8 oz glass of reverse osmosis water with mineral filter on it, with 3 drops of AlkaZone on it, and it reads about a 9.0. It works.
2082262
FROM HM DIGITAL: The PH-200 meter is three-point checked and factory calibrated to pH 7.0. While this is suitable for many applications, It does feature digital auto calibration to pH 4.0, 7.0 and 10.0. The meter should be re-calibrated once per month and it is recommended to re-calibrate it as close as possible to the pH level that will be tested in order to get proper results and prolong the life of your meter.A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit www.tdsmeter.com/products/ph200.html FROM HM DIGITAL: The PH-200 meter is three-point checked and factory calibrated to pH 7.0. While this is suitable for many applications, It does feature digital auto calibration to pH 4.0, 7.0 and 10.0. The meter should be re-calibrated once per month and it is recommended to re-calibrate it as close as possible to the pH level that will be tested in order to get proper results and prolong the life of your meter.A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit... » Read More FROM HM DIGITAL: The PH-200 meter is three-point checked and factory calibrated to pH 7.0. While this is suitable for many applications, It does feature digital auto calibration to pH 4.0, 7.0 and 10.0. The meter should be re-calibrated once per month and it is recommended to re-calibrate it as close as possible to the pH level that will be tested in order to get proper results and prolong the life of your meter.A free packet of pH 7.0 buffer is included with the meter. Additional pH buffers for calibration are available for purchase. For more information, please visit www.tdsmeter.com/products/ph200.html « Show Less
769493
The bottle says that the color code is light bluish for 8.5 and higer, so you probably wont be able to accuratly tell what the ph is if it higher. If your just testing regular things like your gardens water you will almost never get any reading that are higher than 8 or lower than 4 (or atleast i would hope so). Hope it helps a little!
748988
Any. All ph meter should be calibrated once a while with a solution like this. You will find helpful to use the one suits best for your measures. Lets say you have to measure ph levels arround 5. So you get the 5 calibratiom solution. Or you need to measure arround 11, then you get the 11 calibration solution. Or like me, for marine aquarium, that o need to be as acurate around 8, then I use this product. Some meters will require two calibration Solutions, check that too.
432706
I have not. Without comparing to a calibrated gauge, you won't know which has gauge is actually the accurate one. What I like about this gauge is that it gives me percise consistent results.. Hard to tell how accurate they are however like I mentioned.
1035791
I have a pH meter that I use for wine making. It has a resolution of 0.01 pH, and an accuracy of +/- 0.01. I calibrate it before every use so I am confident of the reading. The pH of the water form the pitcher when new was just over 9 - about 9.03. After 4 months of use with the same filter is is now reading about 8.79. We use two to three pitchers of water per day.