A clamp-style ground resistance tester that measures earth resistance and leakage current without needing auxiliary ground stakes, letting a single earthing conductor be checked non-invasively by simply closing the jaw around it. Its backlit LCD gives 0.001-ohm resolution on low-resistance readings, and it can log roughly 300 stored measurements with user-settable alarm thresholds for pass/fail checks. Housed in a durable double-molded clamp with a CAT II 300V rating, it's built for routine grounding and bonding verification.