Electrical Resistance Probes

Electrical resistance probes measure the change (increase) in electrical resistance due to a reduced cross-sectional area of the sensing element as a result of corrosion. The sensitivity of the sensor increases with a decrease in thickness of the sensing element; however this also results in a reduced lifetime. Any build up of deposits on the sensing element will affect the electrical resistance readings from the probe. Electrical resistance probes are also temperature dependent requiring an additional shielded probe for proper corrosion rate adjustments. They may be permanently installed within a system for continuous monitoring or potable for periodic measurements.