Front pageSearch productsOthersWater hardness tester kitHWS Option Harvia Water hardness tester kitItem number HarviaHWS-M-HElectrical number (STK)8266951Certificates Find your nearest dealerIntroductionTechnical dataProduct familyTechnical dataFeaturesMeasurementsWeightsLogisticsPlease check the product manual for updated information before use.HWSAll items in product family