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The water hardness tester is a mobile measuring device for liquid analysis. This enables the most varied of measurements to be carried out with the water hardness tester. With this water hardness tester, for example, it is possible to determine alkalinity, chlorine, cyanuric acid or the pH value. In order to carry out a measurement with the water hardness tester, a water sample of 10 ml must be placed in a cuvette. The built-in LED in the water hardness tester generates a test light in the wavelength ranges of 503 nm, 570 nm and 620 nm. A photodiode now recognizes the value to be measured based on the light transmission of the sample.
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