Optical pH sensor for the alkaline region

Robert Blue, G. Stewart

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


An optical sensor incorporating near infrared opto-electronics which measures pH in the alkaline region is reported. Contaminants within the aqueous solutions whose pH is being measured interfered with the evanescent wave sensing technique and a method to overcome this problem is demonstrated.
Original languageEnglish
Pages (from-to)526 - 528
Number of pages3
JournalElectronics Letters
Issue number6
Publication statusPublished - 13 Mar 1997


  • alkaline region
  • evanescent wave sensing technique
  • near infrared opto-electronics
  • optical pH sensor


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