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Gas Data GFM400 series Landfill Gas Analysers
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The GFM400 Series of handheld eld instruments mark a step change in the design, performance and maintenance of portable landll gas analysers.

Gas Data GFM400 series Landfill Gas Analysers

The GFM400 Series of handheld field instruments mark a step change in the design, performance and maintenance of portable landll gas analysers. They meet all current demands from the landfill, biogas and contaminated land monitoring markets. Incorporating industrial standard sensors and user replaceable battery packs the GFM400 series leads the way for easy expansion, easy upgrade and easy maintenance. Gas Data’s open upgrade path design philosophy guarantees that any model can be upgraded at any time.

Has been designed with the needs of the landfill operator in mind. It has 5 gas channels, measures atmospheric, static and differential pressure – and can be used with an orifice plate. The GFM426 contains all our datalogging functionality, is lightweight, uses an clear backlit LCD display and runs for 8 hours on a single charge. The instrument is supplied in a carry case which also contains the charger, USB cable and some essential spares to get you started.

Download Datasheet:

Measures the proportions of methane (by Volume and LEL – Lower Explosive Limit), Carbon Dioxide, Oxygen, Hydrogen Sulphide and Carbon Monoxide in soil gas. Hexane content can be measured to assist in areas with hydrocarbon vapours (from spilt fuels, oils or other contaminants), and the GFM436 can also measure gas pressure (differential and static), flow rate (instantaneous and peak) and temperature. An optional temperature sensor can be plugged in for gas temperature measurements or alternatively a vane anemometer can measure the velocity in a gas extraction system pipeline.

Download Datasheet:

Series Features
  • Up to 7 gas analysis channels
  • 4 Wavelength optical infra-red analyser
  • Atmospheric pressure
  • Powerful sample pump
  • User replaceable sample lter
  • Field replaceable/rechargeable battery pack
  • Optional ow, pressure and temperature
  • Industry standard sensors
  • Open upgrade path
  • Data storage option
  • 12 month service interval

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About is operated by Accurate Instruments (NZ) Ltd.
Accurate is one of the few 100% New Zealand owned and operated safety instrumentation companies in New Zealand today. This is in a market dominated by larger foreign owned companies, yet we continue to operate as a strong independent supplier to the NZ market.

We specialize in the supply, service and support of safety equipment and safety systems to protect workers and their workplaces with some of the world’s top quality technical safety instruments available, yet our pricing is highly competitive and represents value for money.

We are instrument consultants, and endeavour to find the right solution for our client by careful analysis of the application and intended result. We pride ourselves on our professionalism, ethical industry responsibility, specialist advice and service, quality of product, and of course our people.



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192 Marua Road
Mt Wellington
Auckland 1051

4 Avenger Crescent
Christchurch 8042