Inductive resistance probes have many similarities to ER probes but offer significantly improved sensitivity. Mass changes in the sensor element are detected by measuring changes in the inductive resistance of a coil, located inside the element. For a given sensor element life, these probes will tend to show-up a change in corrosion rate much sooner than the equivalent ER version.
Inductive resistance probes require temperature compensation, similar to ER probes. Like ER probes, the sensors can be used in a broad range of environments. They can be considered for low conductivity and non aqueous environments, where electrochemical techniques are generally unsuitable. Inductive Resistance sensors are generally reported to be at least two orders of magnitude more sensitive than the corresponding ER type. (reference)