Portable Electrochemical Impedance Analysis System

The portable electrochemical analysis system has high integration and low cost, which solves the problem of large size and high price of traditional instruments on the market. Based on the existing research, this paper develops a multifunctional detector with STM32 processor as the core. The system realizes the data analysis through calibration and advanced processing technology. The hardware part adopts signal conditioning circuits such as controllable cross-group amplifier circuit to expand the measurement range and realize accurate measurement of data. Through strict analysis of error factors, this design is optimized and the sensitivity is improved. The experimental results show that the average relative error is 0.56%, which can meet general measurement needs. The instrument is not only compact in structure, but also simple to operate and low in cost.