Context:

Based on an analysis of the development of biodigester technology, a recurring problem with the rigorous quantification of methane was observed. A bibliographical review evidenced systems that are inefficient or have high costs. This work proposes an accessible and effective system that seeks to contribute to related academic and research projects.

Method:

Methane quantification is performed via an MQ-4 series sensor coupled with a capsule, creating a partially closed medium in which a dilution of sample gases and ambient air is injected by using a syringe, thus extending the measurement range of the sensor.

Results:

A calibration curve was elaborated, extending the measurement range from 0,02-1% concentration to 10-80%v/v, with a variance of ± 5%.

Conclusions:

An efficient and accessible prototype for methane quantification for academic and research purposes was developed. A guide for replicating the process is added as a complement.

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