Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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A Study on the Detection Behavior of Chlorine Dioxide on Metal Oxide Sensors

금속산화물센서의 이산화염소 가스에 대한 감지거동에 관한 연구

  • Yu, Joon-Boo (Division of Electronis, Information & Communication Eng. Kangwon National University) ;
  • Byun, Hyung-Gi (Division of Electronis, Information & Communication Eng. Kangwon National University)
  • 유준부 (강원대학교 전자정보통신공학부) ;
  • 변형기 (강원대학교 전자정보통신공학부)
  • Received : 2020.05.20
  • Accepted : 2020.05.30
  • Published : 2020.05.31
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Abstract

Chlorine dioxide is very effective gas for sterilization or disinfection (in manufacturing), and does not produce harmful by-products after use. However, if its concentration exceeds 10 %, it become explosive and cannot be compressed or stored. Therefore, it is necessary to measure its concentration. In this study, the concentration of chlorine dioxide with a high oxidizing strength was measured using a metal oxide sensor. The sensor was a commercially available TGS series from Figaro. The sensitivity of the sensor was inversely proportional to a low concentration of chlorine dioxide gas below 6 ppm and returned to the initial resistance at about 6 ppm. When the gas concentration reached multiples of 10 ppm, resistance of the sensor increased to several megaohms.

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References

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