ER probes are commonly used for measuring the cathodic protection system of buried pipelines. The SensCorr can measure Electrical Resistance (ER) at an accuracy of up to 0,1 micrometer metal loss.
But the SensCorr also measures the cathodic protection performance by establishing the protection current density. This is implemented by connecting the working electrode to the object under cathodic protection via a cable to the SensCorr enclosure. In this way the protection current in mA/cm2 is measured.
AC current and railroad interference on the cathodic protection system are measured direct and at high accuracy. The interface (the HART Loop Converter) transfers 4 parameters:
- ER metal loss in micrometer.
- The protection potential E-cp in mV.
- The CP current density in mA/cm2.
- The potential E-corr in mV. This is the potential where the cathodic current reverses in an anodic current.
- AC interference Voltage (in mV) and frequency between the Reference and the Working Electrode.