A robust sensor for inline pH measurements

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dc.contributor.authorNair, Nikilaen
dc.contributor.authorAkshaya, A.V.en
dc.contributor.authorBosco, Michael Johnen
dc.contributor.authorAnanthasuresh, G. K.en
dc.contributor.authorJoseph, Joseen
dc.contributor.funderMinistry of Electronics and Information technologyen
dc.date.accessioned2024-12-03T11:39:33Z
dc.date.available2024-12-03T11:39:33Z
dc.date.issued2024-11-07en
dc.description.abstractConventionally, a pH sensor having a glass bulb and a liquid-based reference electrode is used for accurate, real-time pH measurement. However, glass bulb-based pH sensors suffer wear and tear in harsh operating conditions and yield erroneous readings in strong alkaline and acidic media. This necessitates the development of a robust pH sensor that renders stable performance in harsh operating conditions. This paper reports the fabrication and characterization of an all-solid-electrode pH sensor with excellent linearity in the pH range of 4 to 9 with a sub-Nernstian slope of -43.18 mV/pH. The fabrication process of the sensor is explained in detail, and the performance of the sensor is validated with extensive characterization. Furthermore, the efficacy of the sensor in practical applications is established by measuring the pH of idli batter during its fermentation process. The proposed sensor is also used to measure the pH of soil solutions, wherein the pH of soil samples showed an error of less than ±0.15 pH when compared with a laboratory pH meter.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationNair, N., Akshaya, A. V., Bosco, M. J., Ananthasuresh, G. K. and Joseph, J. (2024) 'A robust sensor for inline pH measurements', IEEE Sensors Journal. https://doi.org/10.1109/JSEN.2024.3489659en
dc.identifier.doihttps://doi.org/10.1109/JSEN.2024.3489659en
dc.identifier.eissn1558-1748en
dc.identifier.endpage96en
dc.identifier.issn1530-437Xen
dc.identifier.issn2379-9153en
dc.identifier.journaltitleIEEE Sensors Journalen
dc.identifier.startpage95en
dc.identifier.urihttps://hdl.handle.net/10468/16697
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.ispartofIEEE Sensors Journalen
dc.rights© 2024, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.en
dc.subjectpH sensorsen
dc.subjectElectrochemical pH sensingen
dc.subjectSoil pHen
dc.subjectAll-solid electrodeen
dc.subjectSub-Nernstianen
dc.titleA robust sensor for inline pH measurementsen
dc.typeArticle (peer-reviewed)en
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