Development and Calibration of a Microfluidic, Chip-Based Sensor System for Monitoring the Physical Properties of Water Samples in Aquacultures
Micromachines, vol. 15, pp. 755
Abstract
In this work, we present a compact, bifunctional chip-based sensor setup that measures the temperature and electrical conductivity of water samples, including specimens from rivers and channels, aquaculture, and the Atlantic Ocean. For conductivity measurements, we utilize the impedance amplitude recorded via interdigitated electrode structures at a single triggering frequency. The results are well in line with data obtained using a calibrated reference instrument. The new setup holds for conductivity values spanning almost two orders of magnitude (river versus ocean water) without the need for equivalent circuit modelling. Temperature measurements were performed in four-point geometry with an on-chip platinum RTD (resistance temperature detector) in the temperature range between 2 °C and 40 °C, showing no hysteresis effects between warming and cooling cycles. Although the meander was not shielded against the liquid, the temperature calibration provided equivalent results to low conductive Milli-Q and highly conductive ocean water. The sensor is therefore suitable for inline and online monitoring purposes in recirculating aquaculture systems.
Authors 8
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Affiliation as printed
Laboratory for Soft Matter and Biophysics ZMB, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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Affiliation as printed
Institute of Nano- and Biotechnologies INB, Aachen University of Applied Sciences, Heinrich-Mussmann-Strasse 1, D-52428 Jülich, Germany
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Affiliation as printed
Laboratory for Soft Matter and Biophysics ZMB, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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Affiliation as printed
Laboratory for Soft Matter and Biophysics ZMB, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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Affiliation as printed
Laboratory for Soft Matter and Biophysics ZMB, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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Instituut voor Landbouw en Visserijonderzoek
Affiliation as printed
Cell Blue Biotech and Food Integrity, Fisheries and Food ILVO, Flanders Research Institute for Agriculture, Jacobsenstraat 1, B-8400 Oostende, Belgium
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Forschungszentrum Jülich · FH Aachen
Affiliation as printed
Institute of Biological Information Processing (IBI-3), Research Centre Jülich, D-52425 Jülich, Germany
Institute of Nano- and Biotechnologies INB, Aachen University of Applied Sciences, Heinrich-Mussmann-Strasse 1, D-52428 Jülich, Germany
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Affiliation as printed
Laboratory for Soft Matter and Biophysics ZMB, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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