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Introducing the Clamp On Earth Resistance Tester LCD from Extech - the ultimate tool for electricians, HVAC technicians, and other professionals who need to test earth/ground systems with precision. This noninvasive clamp-on device measures ground resistance from 0.2 mA to 30 A, allowing you to detect any discrepancies quickly and efficiently. The autoranging feature ensures accurate results every time, while programmable data logging, automatic self-calibration, high and low alarms, and a 9999-count LCD display provide an array of advanced features to improve productivity on the job site. Whether you're working in residential, commercial or industrial settings, the Clamp On Earth Resistance Tester LCD from Extech is the perfect solution for verifying ground electrical systems and ensuring worker safety.