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4-Wire earth ground resistance tester kit. Includes all hardware necessary to measure earth ground in 4 ranges from 2 to 2000Ω. Comes with Limited NIST Certificate.

Extech GRT300-NISTL Earth Ground Resistance Tester Kit, 300 AC Voltage NIST Certified

grt300nistl-earth-ground-resistance-tester-kit-300-ac-voltage-nist-certified

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