In this study, a low-cost RGB sensor is developed to measure online the microalgae concentration within a photo-bioreactor. Two commercially available devices, i.e., a spectrophotometer for offline measurements and an immersed probe for online measurements, are used for calibration and comparison purposes. Furthermore, the potential of such a sensor for estimating other variables is illustrated with the design of an extended Luenberger observer.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4435131 | PMC |
| http://dx.doi.org/10.3390/s150304766 | DOI Listing |
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