Hanna Instruments HI721 Iron Checker HC Handheld Colorimeter 0.00 to 5.00 ppm Range

Basically, besides chlorinating the well 2x a year, I have to keep an eye on the iron filter to make sure it is functioning properly. Before, I used a test kit containing a similar reagent, which causes the sample to turn an orange shade. If then you compare it with a color chart, you will find that only 5 colors had been included in the kit. 0, 3, 3. These values range from 5, 1, 3 and 5 parts per million. You can only see the range in general, which is not enough for a good deal. It's barely possible. This weekend, I used the Hanna tester for the first time and it gave an error code of In the house, the reading is 15 ppm. Using my other test as a comparison, I could see that there was a slight orange tint, and my best estimate was that it was less than 0 percent. The 0 is probably about half way between the zero and no color (0). This shade is 3 shades. This was super cool, so thank you. With the Hanna, I tested the raw water in my well and it came back at As I used the old Mark 1 eyeball test, I only had a view of up to 8 ppm, depending on the lighting it could have been more or less. Within the limitations of the old test kit, I have at least determined that this is the same range as the old one. Even if the actual accuracy of the Hanna is not as good as the Hanna tells me, now I have the benefit of an actual number that is not subjective like what I would get if I manually evaluated the results.

Olive John

| Dec 07, 2020

Could you please tell me where I can get 00PPM from? Even though there was enough reagent in the box, the box was already open when I arrived. It's unknown if it was a demonstration model or not. In any case, these packets are nearly impossible to put all the way in the bottle, so it isn't clear how important it is that every grain get into the bottle. In order to help me, I'm going to consider a mini funnel or similar tool. Using a single bottle, pouring C1 into the same bottle, and then mixing in the reagent is not possible according to the directions. When the unit is switched on, an alarm will sound Abort your test before this time and turn off the power. You need a bottle filled with the undiluted alcohol solution Here is a sample that has already been reacted, and another ready to go. There is a 0 in my results. The water tested at this point is 0PPM on nearly every test, which I consider suspicious. I've tested out of the tap as well as out of my aquarium that I've been adding iron supplements to daily. In one of the bottles, I did put a few drops of supplement and mixed with tap to make sure it actually works, and that gave me an accurate PPM value. Yesterday, I tested my aquarium water and found it to have a 0 PH. It is 33ppm. The prior night, I had added more iron than that, but I probably could have done without it. Immediately after that, I ran the test with the same samples and got a 0, not more than 2 minutes later. PM = 00. The trust factor in this thing is just not there Is very convenient, but I have not been able to get it to work correctly.

Ezra Rowe

| May 31, 2021

In this comparison, there are 00 readings versus 0 readings. The lab is in 8th grade. To me, the product appeared to be a good deal at the price point. It's important for our softener to work, so I bought this product. . * *2. As soon as I read the safety data sheet for the product, I began to lose enthusiasm. Personally I used the skin and inhalation ppe as acute toxicity in 4 is a serious concern for 1. 2. 3. The iron in my water, which has been known to have an issue for decades, was zero when tested in the lab, under normal conditions. The atmospheric pressure was 79 parts per million. Despite the fact that it is not terrible, it causes stains. According to this tester, it was 0 out of 100. In any case, it is too late for me to return the product, so I am forced to accept The time has come for me to try another brand. I'll read the SDS first.

Cecelia Bird

| Feb 22, 2021

This little thing enables my aquaponics system to grow lush and green I've found that the readings vary by a few hundredths, but they are still accurate enough for my purposes. I would like to emphasize the fact that they do not include many powder packets, and a third bottle would be very nice.

9/27/16 Few weeks ago, Hanna rep contacted me out of the blue and asked to check if my Checker was working, and if any more reagents were needed. It never occurred to me that there were services like this available. The fact that this happened to me would have been hard to believe if not for me. As well as checking in on me, Rindie Egan from the Texas office I have some news regarding how it has held up so far. Rindie is once again going to help me out since one of the bottles I was working on broke last week. I had called her previously and she helped me out. I have been pleased with the results of the checker. It is important to note that I switched over to rechargeable batteries, and the checker does not like them. They work as long as I don't apply too much pressure to the bottom plate, so I have to be careful not to screw the bottom plate in all the way. I can deal with the soft handling since I'm cheap and can fit with regular batteries. It would be great if I could add a sixth star after this experience.

Jonas Knight

| Feb 05, 2021

A much more expensive Hach DR/890 often provides me with greater assurances of the accuracy of the readings from this device. Each time I checked, I found the reading to be very close (within 5%, and typical differences around I struggled to remove the reagent from the powder pillows, the biggest challenge. This is not something one does immediately. Work above a disposable surface (paper towel) or one you can easily clean. If you spill reagent powder or water, you will get a mess. This is 1. Make sure there is no powder in the upper part of the pillow by lightly massaging it in a vertical position
2 Using a sharp knife, cut the pillow 1 cm below the edge (ignore the printed line) If you cut the pillow, keep it away from your face, so as not to breathe the powder that may fall off. 1. 2. 3. As you pinch the lips and form a diamond shape with the corners of the pillow, bring them together Taking the step has the highest learning curve, so practice will be essential
4. The powder should be carefully poured into the cuvette, tapping briefly against the cuvette with the powder pillow In the beginning, it will be difficult to avoid spills of reagent, but gradually you will become more adept. You need to follow the steps 1 - 3 in the video You should put 3 before anything else so you won't waste time trying to figure it out.

Oakleigh IQBAL

| Dec 04, 2020