Vaisala has launched the world’s first 3-in-1 in-situ biogas analyser, the MGP261.

The MGP261 relies on CARBOCAP® technology that has been in operation in a wide variety of other industries for years.

The instrument combines second generation CARBOCAP-technology for measuring methane, carbon dioxide and humidity into a single compact probe that is EX-certified for operation directly in corrosive, potentially explosive biogas streams.

The Vaisala CARBOCAP® sensor features an electrically tuneable Fabry-Pérot Interferometer (FPI) filter. The micromechanical FPI filter enables a reference measurement at a wavelength where no absorption occurs.


Source: Vaisala

When taking the reference measurement, the FPI filter is electrically adjusted to switch the bandpass band from the absorption wavelength to a non-absorption wavelength.

With the MGP261, humidity and carbon dioxide are measured with the same optical filter, and a second optical channel measures methane.

Applications for the technology include anaerobic digestion and landfill gas monitoring, activated carbon filter monitoring in biogas treatment processes, and CHP engine feed gas monitoring.

Effective biogas process optimisation requires in situ monitoring of the key parameters, methane, carbon dioxide and humidity. The Vaisala’s MGP261 has given the market an opportunity to derive more value from waste; improve the profitability of biogas plants; help reduce waste; lower GHG emissions and recycle agricultural nutrients.


Source: Vaisala