Hydrogel-based sensor for CO2 measurements

S. Herber, Wouter Olthuis, Piet Bergveld, Albert van den Berg

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


    A hydrogel-based sensor is presented for CO2 measurements. The sensor consists of a pressure sensor and porous silicon cover. A pH-sensitive hydrogel is confined between the two parts. Furthermore the porous cover contains a bicarbonate solution and a gaspermeable membrane. CO2 reacts with the solution resulting in a pH change. The hydrogel responds to this by generating a certain pressure which is measured by the pressure sensor. Experiments show that the sensor responds to CO2 steps within reasonable time and with good signal response. Especially due to the lack of any reference electrode this sensor principle proofs to have great potentials.
    Original languageUndefined
    Title of host publicationEurosensors XVII
    Place of PublicationRome
    Publication statusPublished - 15 Sep 2004
    EventEurosensors XVIII, European Conference on Solid-State Transducers - Rome, Italy
    Duration: 13 Sep 200415 Sep 2004


    ConferenceEurosensors XVIII, European Conference on Solid-State Transducers


    • METIS-218795
    • IR-48294

    Cite this