Ultrasonic process gas flow measurement

  • Measurement of dry and wet biogas with variable composition
  • Integrated methane content measurement
  • No moving parts and no pressure

The OPTISONIC 7300 Biogas offers an ultrasonic measurement solution for biogas and landfill gas. Biogas, generated from bio feed stocks by fermentation, mainly contains methane and CO2 in a variable composition. It contains also small amounts of other gasses like H2S, Nitrogen and hydrocarbons or can be saturated with water.

The OPTISONIC 7300 is specially designed to measure biogas and landfill gas and can measure this with high CO2 content, saturated with water or with free condensation water present. The flowmeter provides additional functions like calculation of standard volume, methane content measurement and diagnostics features.

The OPTISONIC 7300 Biogas does not have the limitations that are usually associated with traditional gas flow meters like periodical recalibrations, maintenance, pressure loss and a limited flow range. The OPTISONIC 7300 combines the advantages of ultrasonic measurement in a way that it is efficient, reliable and easy to use.


  • Wide flow range
  • Independent of gas density and composition to a large extend
  • No maintenance
  • No recalibration
  • No moving parts, no pressure loss


  • Water and wastewater, waste treatment
  • Agricultural sector
  • Biogas plants


  • Measurement of raw/wet biogas directly from fermentation
  • Measurement of dry biogas
  • Measurement of landfill gas
  • Measurement of methane content
  • Conversion to standard volume


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