Biogas methane content is a relevant variable in anaerobic digestion processing where knowledge of process kinetics or an early indicator of digester failure is needed. The contribution of this work is the development of a novel, simple and low cost automatic carbon dioxide-methane gas sensor based on the solubility of gases in water as the precursor of a sensor for biogas quality monitoring. The device described in this work was used for determining the composition of binary mixtures, such as carbon dioxide-methane, in the range of 0-100%. The design and implementation of a digital signal processor and control system into a low-cost Field Programmable Gate Array (FPGA) platform has permitted the successful application of data acquisition, data distribution and digital data processing, making the construction of a standalone carbon dioxide-methane gas sensor possible. © 2012 by the authors; licensee MDPI, Basel, Switzerland.
CITATION STYLE
Cadena-Pereda, R. O., Rivera-Muñoz, E. M., Herrera-Ruiz, G., Gomez-Melendez, D. J., & Anaya-Rivera, E. K. (2012). Automatic carbon dioxide-methane gas sensor based on the solubility of gases in water. Sensors (Switzerland), 12(8), 10742–10758. https://doi.org/10.3390/s120810742
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