GFM 406

The GFM 406 is an instrument designed for a variety of applications. It is fully configurable to each client’s requirements, making it a uniquely versatile instrument. Gas Data’s software and hardware present clients with a wide range of gas analysis options.

This instrument provides pressure measurements across three reference points: Atmospheric; Static (Gauge); Differential. The velocity of the gas within a pipe can be captured using an optional vane anemometer.

It can be configured with infra-red channels for ch4 and co2 analysis – with an optional LEL expansion – alongside up to four electro-chemical cells to measure any combination of O2, CO, H2S, H2, or hydrocarbons.



Biogas monitoring and analysis | Land remediation |  Landfill gas monitoring and analysis | Odour monitoring and control | Upgrading/Biomethane| Waste water and sewage


  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406
  • GFM 406


  • Ex. Rating: EEx ib IIB T1
  • Provides measurements of up to 6 gases
  • Measures gas pressure
  • Small, portable design that is easy to fit in one hand
  • SiteMan PC software included
  • High-contrast LCD display
  • User-swappable battery pack
  • Battery life ranging from 8 to 12 hours
  • Maximum charging time of 4 hours
  • Charger suited to client’s country
  • Protective, weather-proof leather case
  • Supplied in ready-to-go site kit
  • Annual recalibration interval
  • Optional extra of vane anemometer to measure gas velocity of 0.5 – 40m/s
  • Optional extra brass probe to measure gas temperature
  • Data-logger with USB download