Extech GRT300 4-Wire Earth Ground Resistance Tester (2 to 2000 Ohm) w/NIST Calibration 100 Pint Dehumidifier Battery Charging Time: 4 hours

Battery Charging Time: 4 hours to 90%

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Extech GRT300 4-Wire Earth Ground Resistance Tester (2 to 2000 Ohm) w/NIST Calibration 100 Pint Dehumidifier Battery Charging Time: 4 hoursThe Extech GRT300 NISTL is a professional grade ground resistance tester built for reliability and versatility across a wide range of electrical environments. With its ability to perform 2 wire, 3 wire, and 4 wire testing, it delivers flexible and accurate measurement of earth ground resistance and soil resistivity, critical for verifying grounding system performance in industrial, utility, and telecom settings. This handheld unit features a user