Determines electrical conductivity of soil and features a direct readout gauge plus a chart which tells your soil condition. Readings available on two scales: millimhos for soil solutions and PPM for hydroponics or water. By using this tester, you can save money through reduced use of excess fertilizers and profit improvement from better crops and larger yields. Includes built-in electrode (cell), pre-marked test jar to help you make a soil in water solution easily, battery, thermometer, and carrying case. Range: 0-10 millimhos; 0-6400 ppm.