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Simple evaluation of water quality improvement test
On 2017-08-04 15:57:59
Although only the approximate value appears, the result comes out on the spot so you can give feedback to the next exam, it is very convenient, I think that the price is also reasonable.
Since the judgment color changes with time, I am happy that I can change a little more.
It is unhappy to say clearly. Although it is possible to make color judgment in 2 minutes, I thought that it would not be the color of judgment unless it took more than 2 to 3 hours. I think so because it is compared with the numerical result of the authorized laboratory. It does not change in 2 minutes. Besides, the color of less than 1 mg / liter is uncertain. I wanted it to be a mount with a color suitable for judgment.