Low-power and high-sensitive pH sensor for monitoring of cow-rumen in real time

Lan Zhang, Jian Lu, Hironao Okada, Hirofumi Nogami, Toshihiro Itoh, Shozo Arai

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)


    In this paper, a solid type pH sensor with ultra-low power consumption of 8.2 X 10-4 mAh for each measurement and ultra-high accuracy of 0.01pH was developed for real-time monitoring of cow-rumen. The sensor combines a metal-oxide-semiconductor field-effect transistor (MOSFET) with a separate gate as a sensing electrode, which was fabricated by indium tin oxide (ITO) with an optimized capture structure. The evaluation results revealed that the sensor has high-sensitivity of >14 μα/pH, while keeping a stable baseline at pH 7 in cow's rumen for several days. Fields test was carried out by using above sensor, which clearly demonstrated that the pH values strongly depend on activities of the cow recorded by a camera. The developed pH sensor is believed significant important for preventing diseases as well as for improving the efficiency of the food production.

    Original languageEnglish
    Title of host publicationIEEE Sensors, SENSORS 2016 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781479982875
    Publication statusPublished - Jan 5 2016
    Event15th IEEE Sensors Conference, SENSORS 2016 - Orlando, United States
    Duration: Oct 30 2016Nov 2 2016

    Publication series

    NameProceedings of IEEE Sensors
    ISSN (Print)1930-0395
    ISSN (Electronic)2168-9229


    Other15th IEEE Sensors Conference, SENSORS 2016
    Country/TerritoryUnited States

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering


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