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A series of extremely robust, easy-to-maintain and powerful portable measuring instruments. The COMBIMASS® GA-m Series represents a milestone in the development of mobile gas analysers. It is excellent for analysing digester gas, sewer gas and also landfill gas from landfills. It has an easy-to-service structure and plug-in system modules so that the instrument can be expanded and upgraded to the latest version at any time. A powerful internal gas pump allows measurements to be taken even in negative-pressure gases and the use of a nickel-metal hydride battery enables the instrument to be used for approximately eight hours without recharging.


  • Gases from anaerobic digestion plants (agricultural, manure, etc., liquid and solid waste digestion), mechanical-biological wastewater treatment plant
  • Landfill gases
  • Gases from the digester in waste water treatment plants


  • up to 7 gas analysis channels in a portable instrument
  • powerful internal sampling pump
  •  user replaceable sample micro-filter
  • optical infra-red analyser with temperature compensation
  •  up to 4 electro-chemical sensors plug-in expandable, integrated cross-sensitivity compensation
  •  storage of data (with reference to the sampling point), read out data via USB or Bluetooth
  •  integrated maintenance diagnosis system
  •  with ATEX-certificate II 3G Ex ic IIB T4
  • Dimensions:
    190 mm x 180 mm x 58 mm
  • Weight:
    Up to 1.7 kg
  • Display:
    TFT, 4.3"
  • Ambient temperature:
    -10 to 45°C
  • Gas pressure:
    200 to 1250 mbar
  • Measurement range:
  • Methane:
    0 - 100% v/v
  • Carbon dioxide:
    0 - 100% v/v
  • Oxygen:
    0 - 30% v/v
  • Hydrogen sulphide:
    up to 10 000 ppm
  • Hydrogen:
    up to 40 000 ppm
  • Ammonia:
    up to 1 000 ppm
  • Carbon monoxide:
    up to 2 000 ppm
  • Measurement time:
    Typical measurement time 10 - 90 seconds (depending on the sensor)
  • Communication/data transfer data:
    via USB or Bluetooth (only option) using software, convert to EXCEL sheet