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Development of a Portable Potentiostat with Wireless Communications for Measuring Dissolved Oxygen

용존산소 측정을 위한 무선통신 기반 휴대형 포텐쇼스탯 개발

  • Lee, Hyun-Seok ;
  • Han, Ji-Hoon ;
  • Pak, Jungho
  • 이현석 ;
  • 한지훈 ;
  • 박정호
  • Received : 2018.07.20
  • Accepted : 2018.09.30
  • Published : 2018.12.01

Abstract

In this paper, we describe a portable potentiostat which is capable of cyclic voltammetry(CV) and amperometry for electrochemical dissolved oxygen sensor. In addition, this portable potentiostat can also transmit the measured data wirelessly to android devices such as smart phone, tablet, etc. through Bluetooth. The potentiostat system consists of three parts; a voltage generator circuit which is controlled by Arduino nano and 12-bit DAC(digital to analog converter) to generate necessary electric potential for operating the electrochemical sensor, an oxidation/reduction current measurement circuit, and a Bluetooth module to transmit data wirelessly to an android device. Once measurements are carried out with the android application, the measured data is transmitted to the android device via Bluetooth and displayed using the android app. in real time. In this paper, we report the measured reduction current with a fabricated dissolved oxygen sensor in both saturated-oxygen state and zero-oxygen states. The results of the developed portable potentiostat system are in good agreement with those of the commercial portable potentiostat (${\mu}stat200$, Dropsens inc.). The measured peak reduction currents using the developed potentiostat and the commercial ${\mu}stat200$ potentiostat were $-0.755{\mu}A$ and $-0.724{\mu}A$, respectively. The reduction currents measured at zero-oxygen state were $-0.005{\mu}A$ and $-0.004{\mu}A$. The discrepancy between those two systems seems very small, which implies successful development of a portable and wireless potentionstat.

Keywords

Portable potentiostat;Wireless communication;Bluetooth;Android application;Electrochemical sensor;Dissolved oxyge sensor

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Acknowledgement

Grant : 1000개 이하 세포샘플의 다변수(pH, 용존산소, 열량) 동시분석이 가능한 대사량 측정시스템 개발, 레이저 유도 그래핀 전극을 이용한 인체 땀 분석용 IoT 기반 웨어러블 멀티센서 개발 연구

Supported by : 한국산업기술평가관리원, 한국연구재단