Development of Low-voltage Urine Sample Conductivity Measurement System for Kidney Stone Risk Assessment

This paper presents the development of a 3.3 V electrical conductivity (EC) measurement system as a part of multiple parameters urine test equipment. The platform serves as a portable point-of-care (POC) device to collect and analysis of data from urine samples for assessing the risk of kidney stone formation. The preliminary test using potassium chloride standard solution and urine sample shows an accuracy of 5% in the range between 0.1 and 35mS/cm. The on-chip implementation is realized in a 0.18um CMOS process in the future.