CAPACITIVE AND RESISTIVE CONDUCTIVITY ENGINE OIL ANALYZER

摘要

A device is disclosed for detecting the degradation of or the presence of contaminants in materials of interest, particularly engine oil. The invention includes a sensor for sensing the dielectric value (or permittivity) and resistive conductivity of the material under test by applying a changing electric field to the material and sensing the resulting signal having a time signal proportional to the dielectric and resistive value of the fluid. This invention also includes a signal processing circuit, responsive to the sensing signal, for converting the signal received to a steady state analog voltage which voltage can be compared to known values representing the state of the material being analyzed.