GFM 406

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

The GFM406 is an ATEX certified gas analyser, designed for a variety of applications. It is fully configurable to each client’s requirements, making it a uniquely versatile instrument.

It can be configured with infra-red channels for CH4 and CO2 analysis, with an optional LEL expansion and up to four electrochemical cells to measure any combination of O2, CO, H2S or H2. With the option of N2 balance calculation, customers can choose up to 7 gas channels.

This instrument is capable of providing three different optional pressure measurements: Atmospheric; Static (Gauge); Differential.

Optional extras to measure velocity and temperature are available.

Due to the configurable design of the GFM406, it is suited for almost any gas analysis application.

Eliminate the need for manual data collection and reporting with Siteman Software – a powerful tool developed in-house specifically for the GFM range. Siteman allows users to collect, analyse and store data, making an essential tool for anyone working on-site.

To download the Siteman Software, please complete the Software Download form.

  • Ex. Rating: EEx ib IIB T1
  • Provides measurements of up to 7 gases
  • Optional expansions to measure atmospheric, static, and differential pressures.
  • Small and portable – easily fits in one hand.
  • SiteMan PC software included
  • High-contrast LCD display
  • User-swappable battery pack
  • Battery life ranging from 8 to 12 hours and 4 hours charging time
  • Charger suited to client’s country
  • Protective, weather-proof leather case
  • Supplied in ready-to-go site kit
  • Manual and unattended data-logger with USB download
  • Optional extra of vane anemometer to measure gas velocity of 0.5 – 40m/s
  • Optional extra brass probe to measure gas temperature

All GFM instruments require annual service and recalibration and service.


Range Comparison Datasheet User Manual Siteman Manual


Download EX Certificates

Product FAQs

  • What is a GFM 406?

    The GFM 406 is an ATEX, IECEx and UKEx rated instrument that is configurable at the point of sale. This configurability allows the GFM 406 to be used in a variety of different applications.

  • How do I order my GFM 406?

    Before enquiring about the GFM 406, please take a look at the instrument datasheet to view all the available expansions. The GFM 406 can include several gas and pressure measurements to suit your application. When placing your enquiry, do refer to each gas and pressure expansion required as this will factor into the final cost and lead time.

  • Where can I use the GFM 406?

    The GFM 406 can be configured to whichever gases you require from the list of available sensors (please refer to the datasheet for these). From there, the instrument’s ATEX rating means it can be used in Zone 1 areas. The full certification is: EEx ib IIBT1

    Please review your risk assessments to ensure that the instrument has the correct certification for use in your application.

  • How do I carry out monitoring with a GFM 406?

    When purchased, you will receive the following with the GFM 406:

    • Instrument
    • Sample Pipe
    • Battery Charger
    • Spares Pot
    • Allen Key
    • USB drive with operation manual

    This is referred to as the “ready-to-go site kit”. All instruments are shipped fully charged and are able to be deployed upon arrival with little to no set-up required.

    The sample pipe provided is ~1m in length and includes a dust trap filter to prevent particulates from entering the sensor and causing damage. The male connector will attach to the inlet manifold of the instrument, and, on the opposite end, the silicon 1/4” tube will connect to most industry-standard sampling points. For in-depth instructions on how to operate the instrument, please view the manual file stored on the received USB drive.

  • How often does my GFM 406 require servicing?

    The GFM 406 requires annual service and calibration. Please contact your supplier to organise service in good time prior to the calibration date- shown on the latest calibration certificate and on the home screen of the instrument.

  • How do I order spares/consumables for my GFM 406?

    Identify the part you require and contact the distribution partner from whom you purchased the analyser. Alternatively, visit the Gas Data website and fill in the enquiry form associated with consumables and spares.

  • How do I book a service?

    It is highly recommended to book a service in advance of the instrument’s calibration date. Reach out to the distribution partner you have purchased the instrument from to receive a service slot. Servicing typically takes 10-15 working days, with collection and reshipment being included in the service cost for UK-based customers. For those sending their GFM 406 from overseas, shipping back will incur a charge.

  • What is the lead time on a GFM 406?

    The GFM 406 is built to order to match the gas and pressure expansion configuration determined by the customer. This, inevitably, will affect the lead time. Instrument lead times can range between 2-14 weeks – please to your order acknowledgement for a live lead time.