Conductimetric sensor for measuring thickness of e.g. fur in water pipe of paper industry, has recuperation electrodes acquiring potential difference of equipotential lines of electric field generated by generator linked to electrodes

摘要

The sensor has two electrodes (1) connected to an alternating current generator generating electric field in a sample. Recuperation electrodes (2) are equipped with two equipotential lines (3) and acquire a potential difference (V) of the equipotential lines of the electric field using a high impedance amplifier. The equipotential lines form a fictive cell in which the current is passed. An N-doped polycrystalline silicon track permits an electrode-contact connection for external connections.