Our earth resistivity test kits are used to measure the resistance of existing earth probes by the 3P method (2 auxiliary rods), or for earth and ground resistivity measurements using 4 rods. We also supply specialist pylon earth testing kits. Our earth and resistivity test kits are compatible with all of our instruments, no matter which types of connectors they use, thanks to the 4 mm Ø. banana jack/fork plug adapters provided.