Is the accuracy of water quality tester high?

    The accuracy of any parameter is critical in water quality testing, and incorrect test results will cause some negative effects. So many people will ask which way to test water quality is accurate on the market? If you want to know which water quality test method is accurate, you should first understand two points. First, what are the main water quality test methods? Second, what parameters should be tested for water quality? First of all, let's talk about the water quality test methods. At present, the main test methods can be divided into water quality tester, titration color test and test strip. The parameters to be tested vary according to different standards.

Which of these water quality testing methods is the most accurate

    If you want to know whether the accuracy of water quality tester is high or that of other test methods is high, you should first understand their respective advantages and disadvantages.

    At present, the water quality tester is the most accurate of all water quality testing methods. Especially, many instruments begin to use photometers to measure the transmittance of a given light wave by changing the color of the water sample. This method is different from other test results, with a resolution of 0.01 ppm in most cases. Therefore, we can say that the water quality tester has the highest accuracy.

    The second is colorimetric (or visual) titration, which uses chemical reagents to change the color of water samples, and then determines the concentration of water quality parameters.        Although its cost is much lower than that of the instrument, it requires certain technical capabilities and experience. For example, the water quality parameters can be obtained quickly by counting water samples according to color changes. Therefore, its accuracy will be affected.

    Another color comparison method. It is very similar to colorimetric method. These tests are relatively cheap, but the stability of water quality test is poor, and it requires good visual judgment to give accurate results. Also, the error is relatively large, which is only applicable to general water quality test.

    At present, the most commonly used is water quality test strip, but the accuracy of this method is very low, but the operation is relatively simple, and it is more stable than liquid reagent, and the shelf life is also a little longer. Although it has the shortest test time, it can not get the accurate content.

   Therefore, water quality tester is the most accurate method among these methods, and the price of the instrument is not low. In addition, calibration and maintenance are also required during testing.