Hanna Instruments HI 729 Checker HC Handheld Colorimeter, For Fluoride Low Range
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I received the reagent and the vials with my kit. There was enough reagent for about 12 HI70436 Deionized Water, For Titration, 3 are other essential supplies (Hanna Instrument HI70436 Fluoride Low Range Reagent Kit, 100 Test)*br>also you need Deionized Water for your control sample. I have a 78-liter bottle). In addition, I received a 3 ml and 10 ml syringe since the one that came with the kit was too small. It took me a lot of going back and forth (I just asked my doctor for those at a regular visit). (I've had migraine headaches for over 20 years, but I really stopped when I used a water filter to remove fluoride and other contaminants.
The one I used once worked. Afterwards, the seal on the reagent bottle failed, so I had to carefully clean up all the reagent that had leaked.
I only use it to test the water in the tap. It is likely that saliva could be used as a sample if it was sufficient.
After I spoke with Hanna Instruments, it took me a while to get my question answered. In the HI729-S kit there are 25 tests and 5 bottles of 30 ml reagent A 26 pack of 4704 is included. A fluoride meter has been giving me concerns. The 1ppm standard version is HI 4010--I bought it on Amazon It costs forty-nine dollars to buy 11 from Hanna There are nine dollars in this sentence. I get all kinds of readings from the HI 729 checking apparatus, none of them being 1 part per million. My numbers are sometimes two and sometimes as low as 1, but then I get them as high as 2, when I measure 8 ml of standard and 2 ml of reagent with a syringe. A range between 7 and 14. This is frustrating to say the least. Therefore, depending on how accurate you want to be, you might find it useful to switch to another checker, and make sure that the standard cells for 'zero' are ready-made. There is nothing you have to change once it has been made. If it works for you, let me know.
Selected User Reviews For Hanna Instruments HI 729 Checker HC Handheld Colorimeter, For Fluoride Low Range
With this tester I feel like I am getting a very good value for my money. It's a good quality kit that permits me to test for fluoride (or verify it's absence) in my drinking water. In my opinion, the only reason I didn't rate it 5 stars is that it is difficult to achieve consistent results until you learn exactly how to do it. The two things you have to do to get repeatable results are This is 1. As a rule of thumb, measure the reagent 2ml per sample (your baseline and your test sample) the same amount for each. Put the provided plastic tip on the end of the syringe, insert it into the reagent, and pull it back until the plunger is on the top of the last black line. Then squirt the reagent into the first You should repeat this step exactly for the second cuvette as well. 2. *br *br Then add exactly the same amount of water to each cuvette (distilled or your sample). It is important to fill them up to the line on the 10 ml line of the concave of the water surface. For the rest of the procedures, please refer to the instructions.
I first bought the high range tester to measure between 0 and 20 ppm with a margin of error of +/- 3% It was much more convenient for my purpose to use the low range tester. It was only a range of 0-100 I needed for testing city water A concentration of 2 parts per million. At +/- 2% there is a much smaller margin of error than at +/- 8% In a test like this, it is important to do the test at a warm temperature. Use warm water from the tap to avoid lowering the 68 degrees Fahrenheit seems to be the optimal temperature. I received a water report from my city of From 1989 to Despite using deionized water, I still got very good results when using distilled water for my calibration sample, which isn't recommended. In my case, I got a result from was within the range of the water report. After adding a bone char carbon whole house filter to rid my home of fluoride, and running it through the filter for several times with bone char, my fluoride level was now low. Not bad, almost cut my fluoride in half, and almost get rid of my chlorine! There is one drawback to the kit, not as much test solution as you would expect, but it is enough to run most tests.
You can use the device right away if you use it as soon as you receive it. But if you are paying this much, you might expect some longevity. As I returned to the kit for more use, I discovered that the reagent had eaten through the plastic bottle it was delivered in and coated the sides of the sample container it.
It is a great product that I bought two of. After spilling reagent, i wiped up the mess. The second issue was that the program initially worked, but then stopped working.
In order to test this product, I used samples that I knew approximate fluoride concentrations to begin with. In addition to the tests being inaccurate, repeated tests of the same sample gave different results. Perhaps I just got a defective tester, but my advice would be to invest a little more money on a more sophisticated device. Testing with this device is time consuming, and it appears inconsistent and.
The plant has died one year after it was planted.
As far as the meter is concerned, it is fine when it comes on, but this is my second one (the first didn't work) and now that one as well does not come on. The only time I have used it is.
In my recent installation of a 6 stage RO unit, I used this to test its effectiveness. In terms of tap water, my first measurement matched the results from my city's water report. In terms of filtered water, my second measurement showed 0 parts per million. My filter works brilliantly at low ppm, either the instrument will not work at low ppm or it doesn't work at all. It's worth a shot to give Hanna a second chance.
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