Digital LCD Display This is a state-of-the-art digital TDS meter tester, it comes with an inbuilt digital LCD with proper graphics to symbolize every measured value which is easy to read and understand from the display screen. Every value and symbol can be visualized more correctly with this display. TDS IN PPM 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 (TDS) are measured as a volume of water with the unit milligrams per liter (mg/L), otherwise known as parts per million (ppm). Multipurpose Meter A healthy metabolism begins with quality water. TDS meters come in a variety of points ranging in applications. Ideal for Aquarium and reef tanksDrinking waterRO/DI SystemPools and spasHydroponicsFood & Beverage