All-in-One Professional TDS (Total Dissolved Solids), EC (Electrical Conductivity) meter from Skies the Limit (StL) - Reliable and Accurate Water Test Results. Includes Leather Case Accurate, Reliable and Fast readings on a large LCD display TDS measures the quality of your water and indicates when to change purifier filters Measure the quality of Water, food (vegetable , fruit and drink) Multiple uses for pools, ponds, spas, aquarium, hydroponics and gardening Accuracy:  2%. Range:0-5000ppm, 0-9990 s/cm, 0.1-80.0C, 32.0-176.0F