A SENSOR (10) FOR USE IN PROCESS TOMOGRAPHY COMPRISING A VESSEL (13) WHICH IS EQUALLY DIVIDED INTO SECTORS (20) BASED ON THE REQUIRED NUMBER OF ELECTRODES (11), A PLURALITY OF MEASUREMENT ELECTRODES (11) EQUALLY MOUNTED ON THE VESSEL (13), WHEREIN EACH ELECTRODE (11) IS PLACED WITHIN THE RESPECTIVE DIVIDED SECTOR (20) IN AN AREA BY THE ANGLE OF θ (18), AT LEAST ONE RADIAL SCREEN (17) IS PLACED WITHIN EACH DIVIDED SECTOR (20) IN AN AREA BY THE ANGLE OF φ(19) AND EQUALLY SPACED IN BETWEEN SAID ELECTRODES (11). MOST ILLUSTRATIVE DIAGRAM: FIG. 3