JOURNAL ARTICLE

Measurement of oxygen concentration in atmospheric air using ultrasound time of flight with humidity compensation.

  • Published In: Review of Scientific Instruments, 2023, v. 34, n. 3. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Fukuoka, Hiroaki; Taskin, Mahjabin; Teii, Kungen; Kato, Yoshimine 3 of 3

Abstract

The article focuses on a method to measure the absolute concentration of oxygen (O₂) gas in humid atmospheric air using ultrasound by compensating for temperature and humidity effects through calculation. The technique relies on detecting small variations in the speed of sound between nitrogen (N₂) calibration gas and atmospheric air, accounting for the presence of water vapor and other gases, to accurately determine O₂ concentration with a measurement error of about 0.4% or less after compensation. The method achieves rapid response times on the order of milliseconds, enabling fast, portable O₂ sensing suitable for industrial, environmental, and biomedical applications. Experimental results demonstrate that the measured O₂ concentration in atmospheric wet air closely matches the standard dry air value of approximately 21%, validating the effectiveness of the compensation approach.

Additional Information

  • Source:Review of Scientific Instruments. 2023/03, Vol. 34, Issue 3, p1
  • Document Type:Article
  • Subject Area:Earth and Atmospheric Sciences
  • Publication Date:2023
  • ISSN:0034-6748
  • DOI:10.1063/5.0113877
  • Accession Number:162857262
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