www.thedriller.com/articles/87883-soil-conductivity-probe
Soil Conductivity Probe
June 1, 2010

The new SC520 soil conductivity probe from Geoprobe Systems is designed to increase probe life and improve probe sealing by taking advantage of a new water seal design and improved strain relief on EC probe cord. The probe utilizes a standard direct image connection tube and drive head.
Geoprobe Systems, Card No. 7