Portable three-electrode circuit for electrochemical micro-sensors

In this paper, based on the three-electrode detection system, the potentiostat circuit based on opamp OPA333 is designed, which includes constant voltage following module, I-V conversion module and filter amplification module. And the potentiostat circuit is connected with arduino microcontroller and Bluetooth module to send data to the mobile terminal. The circuit module converts the chemical information of the object to be measured on the working electrode into electrical signal processing and display under the reference voltage of 2V. It has the advantages of simple structure, low cost, high sampling accuracy, and can achieve dynamic monitoring of electrochemical system reactant concentration through Bluetooth module wireless transmission, which is suitable for the integration of wearable devices.