This easy to use home or cafe test kit is an ideal way to verify your water hardness level prior to purchasing a water filter or use it as a random check that your current filter is performing correctly. This is a simple chemical kit, just count the drops into the tumbler with a measured amount of water. Each drop counts as 20 ppm of hardness or 1 degree German hardness, count the drops until the sample turns colour. Uittreksel van de gebruiksaanwijzing BWT test-kit voor drinkwater ten behoeve van warme en koude dranken. De testkit voor warme dranken wordt gebruikt voor een snelle en eenvoudige bepaling van de totale hardheid (TH) en de carbonaathardheid (CH) van water. Met behulp van deze testkit kunnen de optimale filtercapaciteit en de bypass-instelling afhankelijk van de hardheid van het onbehandeld water bepaald worden. De totale hardheid is een maat voor de concentratie van de calcium- en magnesiumzouten én een maat voor de concentratie van bicarbonaat in het water. Het bicarbonaat is meestal gebonden met calcium en magnesium en vormt de kalk, die bijvoorbeeld in warme drankautomaten voorkomt.
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