Glossary: Surface Resistance

The ratio of applied voltage to the current flowing between two electrodes in contact with the surface of a material.

Surface resistance tests measure the capacity of a material to resist the flow of electricity. To test surface resistance, an ohmmeter applies a current through a material, measures the voltage, and displays the resistance in ohms.

Resistance measurements depend on a number of factors, including ambient temperature and humidity; the most important factor is the resistivity of the material. Results can also vary according to the size of the material under test, as well as the shape of the electrodes and where the electrodes are placed.

Note: Not to be confused with Surface Resistivity.

Illustration on a gray background titled "ANSI/ESD STM7.1 Resistance Tests". On the right side a "Point to Point" test set up is shown, with two probes connected to a surface analog resistance meter and placed 36" apart on the surface being tested. On the right side, the "Point to Ground" set up is shown with a surface analog resistance meter connected to ground and also to a probe on the surface being tested.
Background graphic is a still from the StaticWorx GroundSafe ESD Flooring – Your Trusted Partner explainer animation. In the foreground at the bottom are two boxes. The top is a bright blue with the StaticWorx logo and "GroundSafe ESD Flooring" underneath in white. The second is a dark blue-gray and includes the text in white: “GroundWorx ESD Flooring – Your Trusted Partner”
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StaticWorx high-performance static-control floors protect electronic components, explosives, and high-speed computers from damage caused by static electricity. ESD flooring is part of a system. Choices should always be based on objective, researched evidence. When you partner with us, we look at all possible items that may need to integrate with the floor, and, focusing on your goals and objectives, help you find the right floor for your application.