Determination of the quality of frying oil based on UWB impedance spectrometer

The goal of this paper is to draw attention to the possibility of detecting discarded vegetable oil, used at the fryer, via a UWB integrated reflectometer, which enables wideband sensing from “almost DC” to 9 GHz. An integrated reflectometer allows online monitoring of the differences between pure oil, and oil under measurement. For oil quality sensing, a test was proposed which utilizes a structure consisting of a microstrip sensor, an UWB reflectometer, an UWB radar system with an A/D converter, a source clock signal (CLK) and a computer for processing and evaluating results.