Surface Resistivity, Resistance between 2 points, and Surface to Ground can all be conveniently measured in accordance with EOS/ESD Association Std S4.1. Measurements in the conductive range i.e. upto 10^5 are made at 10V and all higher values at 100V. Measurements can be taken with built-in parallel electrodes or special external probes. A separate cord is also provided for Surface to ground measurements whereby the resistivity differential between any surface and any chosen ground can be determined.