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Handheld Clamp-On Ground Resistance Tester
Measures earth resistance without need to disconnect from the electrical system or need for auxillary ground electrodes or reels. Ground Resistance is auto-ranging from 1 to 199Ω. Current Measurement is auto-ranging from 1mA to 40A. Ground voltage indication - warns of unsafe conditions. Clamping diameter of 1.4" (35 mm) with large jaw design. Stores up to 300 measurements. Includes a hard carrying case, calibration loop, four 1.5V AA batteries and a user manual.