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Check the listing for details. ES3030 5A 400V 0-2000ohm Digital Large-scale Ground Network Resistance Tester. Condition: New. Listed at 2299.00 USD. ES3030 digital large Grounding Resistance Tester consists of a host computer, test leads, and grounding rods. It has functions such as reading, reviewing, saving, and printing historical data. - Soil resistivity electrode spacing range: can set 1m ~ 100m.