HI 98331 Soil Test™ Direct Soil EC Tester  Replaceable 122 mm (4.5”) penetration probe Automatic Temperature Compensation Lightweight and portable The HI 98331 Soil Test™ is a pocket tester specifically designed to directly measure soil conductivity and temperature. With a temperature sensor in the penetration probe, measurements are automatically temperature compensated. The conductivity range can be calibrated at one point and is designed to be performed ... Read More »