Sensing Techniques on Determination of Chlorine Gas and Free Chlorine in Water

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Janudin N., Kasim N. A. M., Knight V. F., Halim N. A., Noor S. A. M., Ong K. K., ...More

JOURNAL OF SENSORS, vol.2022, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 2022
  • Publication Date: 2022
  • Doi Number: 10.1155/2022/1898417
  • Journal Name: JOURNAL OF SENSORS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Yıldız Technical University Affiliated: No


Chlorine gas is a greenish-yellow gas that is one of the most utilized gases in numerous industrial fields. It has been categorized as a choking agent that can threaten human, animal, and environmental safety. Currently, development of highly sensitive, selective, and precise chlorine sensors receives much attention. This review focuses on several sensing techniques used for chlorine gas and free chlorine in water. The fundamental working principles, as well as the sensing mechanisms of chlorine detection covering spectrophotometric, electrochemical, and optical techniques, are described. A comparison of various sensing materials is also discussed. Finally, an overview of the future improvements needed of high-performance chlorine sensors was suggested.