A miniaturized low-power wireless remote environmental monitoring system based on electrochemical analysis

Kwang Seok Yun, Joonho Gil, Jinbong Kim, Hong Jeong Kim, Kyunghyun Kim, Daesik Park, Myeung Su Kim, Hyungcheol Shin, Kwyro Lee, Juhyoun Kwak, Euisik Yoon

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


In this paper, we report a miniaturized low-power wireless remote environmental monitoring system. This system has been developed for on-site monitoring of water pollution by heavy-metal ions. The system is composed of three parts: an electrochemical sensor module using microfabricated electrodes for detecting heavy-metal contamination in sample water; a custom potentiostat module including readout circuitry, analog-to-digital converter and microcontroller; and a radio frequency (RF) module for sending detected signals to a base station through wireless communication. The electrochemical sensor module is implemented using microfabricated mercury working electrodes (WEs), solid-state reference electrode (SSRE), and platinum counter electrode (CE). For the low-power operation, direct frequency-shift keying (FSK) modulation and simple binary FSK demodulation methods are used for RF module which is realized using 0.18μm CMOS technology. All the modules are hybrid integrated in a printed circuit board (PCB) and low-power consumption below 1mW has been achieved.

Original languageEnglish
Pages (from-to)27-34
Number of pages8
JournalSensors and Actuators, B: Chemical
Issue number1
Publication statusPublished - 2004 Sept 1

Bibliographical note

Funding Information:
This work has been supported by the Korea Science and Engineering Foundation through the MICROS center at KAIST.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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