These sensors measure electrochemical activity on the surface of metals to detect corrosion initiation. They typically measure parameters like corrosion potential, polarization resistance, or galvanic currents between two electrodes.

Applications:Widely used in monitoring the corrosion of steel reinforcements in concrete structures such as bridges, tunnels, and buildings.

These are small metal strips made from the same material as the structure, exposed to the same environment. Over time, the corrosion on the coupon can be measured to estimate the corrosion rate.

Applications:Used in bridges, pipelines, and offshore structures to estimate the rate of corrosion in harsh environments.

These probes, made from the same metal as the structure, measure corrosion activity in real time by detecting changes in resistivity or potential.

Applications: Used in harsh environments, such as offshore structures, bridges exposed to de-icing salts, and underground structures.

These sensors measure the impedance of the material in response to an alternating current. Changes in impedance can indicate the presence of corrosion or degradation of protective coatings.

Applications: Used in monitoring the corrosion of steel structures or protective coatings in marine environments, tunnels, or buried pipelines.