Even within a city, the water quality provided by waterworks can vary e.g. the value of water hardness. If you want to know exactly what the water hardness is in your home, you can do it quickly and easily with the OKT-1 hardness tester.
Measure water hardness quickly and easily! Our OKT-1 hardness tester allows fast and accurate water hardness testing. The result is obtained in German degrees of hardness (nk °).
Contents of the package: