The Direct Soil Conductivity & Temperature Tester precisely measures two important characteristics of soil with one handy device. The sturdy 4.5_ soil penetration probe determines both levels simultaneously, and because the temperature gauge is incorporated into the EC tester, temperature compensation is performed automatically. Measures conductivity within 0.0 to 4.0 mS/cm with an accuracy level of ?0.05 mS/cm. Temperature range is 0.0 to 50.0?C with ?1?C accuracy. Each tester is backed with a one-year manufacturer's warranty; probe is protected for six months. Temperature display is Celsius only.