TDS PPM Meter Digital Tester Home Drinking Tap Water Quality Purity Test Tester
4,65 €
The TDS value of pure water is generally 0, that of spring water is between 20-40, and that of tap water is around 3 hundred or even greater. So TDS below 40 is the purity of the water is better. For the sake of your family, always have a water quality testing pen to protect their drinking water safety.
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