Paramagnetic oxygen measurement using an optical-fiber microphone

Cheng Lun Tsai, Chi Shyan Fann, Shyh Hau Wang, Rong Fong Fung

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The oxygen molecule has a strong paramagnetic property compared with other gases. Several methods have been developed to detect oxygen concentration in the air based on this property. In this study, an alternative magnetic field was used to generate an acoustic air pressure signal. This pressure signal is proportional to oxygen concentration in the air, and it is treated as an index of oxygen concentration. To prevent interference of magnetic field on the air pressure sensor, an optical-fiber microphone was used to detect the magneto-acoustic signal. This measurement system was calibrated by gas samples with known oxygen concentrations, and the correlation coefficient of calibration is over 0.99. Mainstream measurement could be possible by using this type of sensing probe.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalSensors and Actuators, B: Chemical
Issue number2-3
Publication statusPublished - 2001 Mar 10

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


Dive into the research topics of 'Paramagnetic oxygen measurement using an optical-fiber microphone'. Together they form a unique fingerprint.

Cite this