Digital pH Meter and TDS Meter Combo Set With High Accuracy TDS METER & PH METER COMBO EACH WITH CARRYING CASE: TDS meter accurately indicates the total dissolved solids of a solution and the pH meter measures the hydrogen-ion concentration of a solution. Both are easy to use, light weight & portable making it easy to check the performance of your water filter at home or elsewhere. Make sure you are always drinking pure water! FAST & ACCURATE RESULTS: Both meters show the results in seconds without the hassle of sending samples off to the lab! The TDS meter has a 0-9990 ppm range & +/- 2% accuracy and the pH meter has a 0.0-14.0 range with a +/- 0.1 pH accuracy. EASY TO USE & CARE FOR: Simply turn the meter on, dip in water & read the results! When you are done, the meter can simply be dried off & stored in the convenient carrying case. FOR INDUSTRY PROFESSIONALS & HOUSEHOLD USE: Used by professionals & homeowners alike to ensure that there are no harmful contaminants present and to test for the waters hardness and pH. MONEY BACK GUARANTEE: If you are not 100% satisfied with your meters, we will refund you, no questions asked!