Methane and carbon dioxide multigas probe MGP262

Get the green gains. Get all the gains.

Stop the loss. The Vaisala CARBOCAP® MGP262 continuously measures the methane concentration in offgas from your biogas upgrading unit to keep you from letting your profits go up in the air. 

Focus on what matters. The MGP262 is the answer to the problem that some methane slip always occurs in the upgrading process. It helps you adjust your process so that you avoid greenhouse gas emissions while you can concentrate on producing the best biomethane possible.

  • Superior stability of measurement
  • Low maintenance and low cost of ownership
  • Compact, in-situ measurement, no need to rely on sampling
  • Easy installation and operation

Key Benefits

Gain peace of mind

Truly robust technology. Easy to install and operate, without need for consumables or sampling, the MGP262 helps makes sure your upgrading unit runs the way you need it to run.

Get your whole process under control

Optimize your upgrading process at all times thanks to the MGP262's continuous, always on measurement.

Reap the financial & green gains

Stop the methane & profit slip. The MGP262 helps you minimize the amount of offgas methane and even carbon credit costs.

Why should I care?

Finance meets green. That’s MGP262. When it comes to offgas from upgrading biogas to biomethane, CO2 can be and should be recovered for further use in e.g. greenhouses and the food industry, or it could be converted to further biomethane through methanization or the power to gas process (P2G). It makes both ecological sense and financial sense — especially since your CH4 emissions cost money in the form of carbon credits.

Trusted technology

MGP262 is based on the groundbreaking and award-winning technology of the MGP261 multigas instrument and the underlying CARBOCAP® infrared sensor technology, which is a cornerstone of Vaisala’s industrial gas measurement portfolio. Its repeatable reliability and low cost of ownership make it a powerfully simple solution to a problem that is both economic and ecological.


Offgas: How much is too much?

Some methane always goes to the exhaust stream and this methane slip can be even larger than in a Combined Heat and Power engine — if you are not managing the process correctly. Should more than 2% of incoming methane end up in the atmosphere, your greenhouse gas emissions would be the same or worse than CO2 emissions from fossil fuels. In fact, emission limits for methane are usually even stricter. Offgas without RTO or other forms of methane removal typically consists of over 95% CO2, ~1% CH4, with the rest typically being nitrogen and traces of oxygen and water vapor.

CH4 emissions can be reduced by carefully adjusting your upgrading process with inline process monitoring, and the MGP262 is a perfect tool for that. If you use Regenerative Thermal Oxidation (RTO) to further reduce methane emissions, an inline methane measurement before the RTO will be useful. The bottom line is that unless you pay attention to CH4 emissions in the offgas you will lose money and harm the environment.


  • Measurement range 0...5% CH4
  • Measurement accuracy +-0.15 %
  • Compact, self-contained unit certified for Ex environments.
  • Durable, integrated and self-cleaning optical sensors.
  • Low cost of ownership. No consumables, no sampling necessary.

Further reading


Installing a biogas measurement instrument in an explosive atmosphere

Installing any electrical device in a hazardous location with an explosion risk requires special precautions and procedures – and installing an in situ measurement device into a gas pipeline presents its own specific risks and requirements.

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Turn on your bio-engine – increasing the profitability of your biogas process

Watch this on-demand webinar anytime to learn new methods to optimize the process between anaerobic digestion and the combined heat and power engine.

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Humidity measurement plays a critical role in profitable biogas production

For biogas producers, keeping the process stable while making sure that combined heat and power (CHP) engines and active carbon filters work smoothly is just one of the challenges they have to face. In-line humidity measurement can help answer these challenges – and make biogas production more profitable.

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How to make biogas production more profitable

An expert panel discussing the ways and the technology towards success -  Vaisala’s Antti Heikkilä interviews two other biogas experts.

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Customer case

Forward to the future — Making biogas production more valuable together with JFE Environment Technology at Miura

To drive large-scale adoption of biogas as an energy source, its cost must be brought closer to that of conventional energy. That cannot be achieved without improving the efficiency of biogas plants and optimizing their use of heating and electricity.

Learn more