INSTANT & ACCURATE With stainless steel 4.8in(122mm) penetration probe, AMT301 Soil EC Tester provides fast and easy on the spot EC measurements for soil and hydroponics nutrient, etc. COMPACT & PORTABLE In a compact pocket size, you can take it everywhere easily. Use this portable EC meter, you can measure soil salinity in greenhouse soil or solution media right on the spot. ATC FUCTION With automatic temperature compensation function, the measurement is more accurate. LCD DISPLAY EC/TEMP dual display on LCD screen which is easy to read. There is a C/F button that you can press to switch between Celsius and Fahrenheit. APPLICATION It is widely used in agriculture to assess soil conditions then you can adjust soil conditions in time to help crops and plants grow better.