Our Konvio Neer Imported Meter can be perfectly applied to the RO membrane system to test the water quality. It checks whether your RO system works properly or not. It is small and light in weight. This meter makes sure that the water you are drinking is safe and healthy for you. It is your reliable assistant. Let’s get rid of water testing methods with this digital device Multipurpose Meter Our KONVIO NEER Total Dissolve Soild water testing meter is ideal for all water purification applications such as: Drinking water, Water filtration and purification, Hydroponics to test nutrients, Colloidal silver,Aquariums,Pools and spas It can be used to check the performance of your water filter, test the quality of filter water, check for hardness and make sure that you are drinking clean water. Total dissolved solids are measured as a volume of water with the unit milligrams per liter (mg/L), otherwise known as parts per million (ppm).