ETCR2000A+ Ground Earth Resistance Tester Digital Clamp Meter Ground Earth Resistance Meter Tester with LCD Display: Amazon.com: Industrial & Scientific
IDEAL Ground resistance Ground Resistance 30 Amp Digital Clamp Meter (Battery Included) in the Test Meters department at Lowes.com
The easiest way to measure ground resistance using clamp meter, but be carefull! | EEP
UT278A Clamp Earth Ground Tester - Power Parameters