Extech grt300 earth testing kit
Extech grt300 earth resistance testing kit extech grt300 the extech grt300 earth testing kit includes all hardware necessary to measure earth ground resistance in 4 ranges from 2 to 2000 omega supplied with test leads with alligator clips 4 x auxiliary earth bars hard carrying case and 8 x 1 5v aa batteries extech grt300 earth testing kit