A micromachined electrochemical sensor for free chlorine monitoring in drinking water

A. Mehta, H. Shekhar, S. H. Hyun, Seungkwan Hong, H. Joe Cho

Research output: Contribution to journalArticle

8 Citations (Scopus)


In this work, we designed, fabricated and tested a disposable, flow-through amperometric sensor for free chlorine determination in water. The sensor is based on the principle of an electrochemical cell. The substrate, as well as the top microfluidic layer, is made up of a polymer material. The advantages include; (a) disposability from low cost; (b) stable operation range from three-electrode design; (c) fluidic interconnections that provide on line testing capabilities; and (d) transparent substrate which provides for future integration of on-chip optics. The sensor showed a good response and linearity in the chlorine concentration ranging from 0.3 to 1.6 ppm, which applies to common chlorination process for drinking water purification.

Original languageEnglish
Pages (from-to)403-410
Number of pages8
JournalWater Science and Technology
Issue number4-5
Publication statusPublished - 2006 May 25



  • Chlorination
  • Drinking water
  • Electrochemical sensor
  • Microsensor

ASJC Scopus subject areas

  • Water Science and Technology

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