Front pageSearch productsOthersWater hardness tester kitHWS Option Harvia Water hardness tester kitItem number HarviaHWS-M-HCertificatesRoom volume - Find your nearest dealerIntroductionTechnical dataProduct familyTechnical dataFeaturesMeasurementsWeightsLogisticsPlease check the product manual for updated information before use.HWSAll items in product family