Landfill gas monitoring equipment measures methane (CH4), carbon dioxide (CO2), and oxygen (O2) concentrations to keep gas collection systems in compliance and gas extraction wells safe to approach. For most Canadian landfill and biogas operators, that means choosing between three purpose-built portable analyzers — the QED GEM5000, the Geotech GA5000, and the QED BIOGAS 5000 — each built for a different point in the landfill-to-digester gas chain.
Table of contents
- What Is Landfill Gas Monitoring Equipment?
- Which Landfill Gas Analyzer Do You Need?
- How Does a Portable Landfill Gas Analyzer Work?
- What Should You Monitor at a Landfill Gas Well?
- Is a Biogas Analyzer Different From a Landfill Gas Analyzer?
- What Are the Safety Considerations for Landfill Gas Monitoring?
- Should You Buy or Rent a Landfill Gas Analyzer?
- Frequently Asked Questions
What Is Landfill Gas Monitoring Equipment?
Landfill gas monitoring equipment is a portable gas analyzer that samples and quantifies the methane, carbon dioxide, and oxygen content of gas drawn from landfill extraction wells, subsurface migration probes, and flare or collection headers. Operators use the readings to tune well valves, confirm flare feed quality, and prove regulatory compliance for gas collection and control systems (GCCS).
ERE Inc. stocks three landfill gas monitors covering the full range of this work — from routine wellfield rounds to anaerobic-digester carbon-credit reporting: the QED GEM5000 Series, the Geotech GA5000, and the QED BIOGAS 5000.
Which Landfill Gas Analyzer Do You Need?
All three instruments measure CH4, CO2, and O2 by volume, but they differ in gas channels, certification, and intended application. The table below compares the specifications that matter for equipment selection.
| Model | Primary use | Gas channels | Certification | Notable feature |
|---|---|---|---|---|
| GEM5000 Series | LFG collection & control systems, flares, migration probes | CH4, CO2, O2 (0–100% / 0–100% / 0–25% vol) + static/differential pressure | ATEX, CSA, calibrated to ISO/IEC 17025 | Calculates balance gas, flow (SCFM), and calorific value (kW/BTU) in one reading |
| GA5000 | Landfill & contaminated-land gas monitoring, modular expansion | CH4, CO2, O2 + optional H2S (up to 1,000 ppm), CO | ATEX, MCERTS, CSA | Modular and upgradeable to six simultaneous gas channels |
| BIOGAS 5000 | Anaerobic digesters, carbon-credit & renewable-energy reporting | CH4, CO2, O2 + optional H2S (up to 10,000 ppm) | ATEX Zone 1, IECEx, CSA, MCERTS | Compatible with LANDTEC Bio Pro software for calibration audit trails |
All three run on an approximately 8-hour field battery, are IP65-rated for outdoor wellfield work, and carry a 3-year manufacturer warranty. Browse the full range in our landfill monitors collection.
How Does a Portable Landfill Gas Analyzer Work?
A built-in sample pump draws gas from the well or probe through a filtered inlet line into an internal sensor bench — typically infrared (IR) sensors for CH4 and CO2, and an electrochemical or paramagnetic cell for O2. The analyzer displays live concentrations and, on the GEM5000 and GA5000, calculates derived values (balance gas, flow rate, calorific value) that operators log for each well on every monitoring round.
Field calibration against a certified span gas is required before each round to keep readings within the tolerances most gas collection permits specify. All three units here support user-performed field calibration rather than requiring a return to the factory.
What Should You Monitor at a Landfill Gas Well?
A standard wellfield round checks three things at every extraction well or migration probe:
- Gas composition — CH4 and CO2 percentage confirms the well is still producing usable gas and hasn't gone anaerobic-dead or been diluted by air intrusion.
- Oxygen intrusion — O2 above roughly 5% at a wellhead signals a leak in the collection piping or over-extraction, both of which increase fire and explosion risk inside the collection system.
- Static and differential pressure — confirms the well valve setting is pulling gas at the intended rate without drawing excess air.
Subsurface migration probes around the landfill perimeter get the same CH4/O2 checks to confirm gas isn't migrating laterally into neighbouring structures — the core purpose EPA's landfill gas program describes for perimeter monitoring at active and closed sites.
Is a Biogas Analyzer Different From a Landfill Gas Analyzer?
Yes — the sensor technology overlaps, but the application and reporting requirements don't. The BIOGAS 5000 is built for anaerobic digesters (farm digesters, food-processing waste, wastewater treatment methane recovery) where operators need a calibration audit trail for carbon-credit and renewable-energy program verification, not landfill compliance reporting. It integrates with LANDTEC's Bio Pro software specifically to produce that documentation.
The GEM5000 and GA5000, by contrast, are built around landfill-specific workflows — wellfield rounds, flare feed checks, and migration-probe surveys — and the GEM5000 additionally calculates calorific value for facilities evaluating gas-to-energy potential from a collection system.
What Are the Safety Considerations for Landfill Gas Monitoring?
Methane is explosive in air at roughly 5–15% concentration by volume and displaces oxygen as it accumulates, creating both a fire/explosion hazard and an asphyxiation risk. Migration probes, valve pits, and gas collection manholes frequently meet the definition of a confined space, which brings entry, testing, and rescue-planning obligations under provincial occupational health and safety regulation — see CCOHS's confined space guidance for the atmospheric-testing sequence (oxygen first, then combustibles, then toxics) that applies before any probe or valve pit is entered or worked over.
Because H2S is also present in landfill and digester gas, both the GA5000 and BIOGAS 5000 offer an optional H2S channel — a meaningful add for sites where hydrogen sulfide has shown up in prior monitoring rounds. For personal multi-gas protection alongside a dedicated landfill analyzer, see our confined space gas monitoring guide.
Should You Buy or Rent a Landfill Gas Analyzer?
It depends on how often you're on site. Consultants running periodic quarterly or annual compliance rounds across multiple client landfills typically rent — the GEM5000 is available through ERE's instrument rental program, avoiding the calibration and factory-service overhead of owning a unit that sits idle between jobs. Facility operators running weekly or monthly internal wellfield rounds, or digester operators generating ongoing carbon-credit documentation, are usually better served buying outright. See our environmental instrument rental guide for the full buy-vs-rent breakdown across ERE's rental fleet.
Frequently Asked Questions
What gases does a landfill gas analyzer measure?
At minimum, methane (CH4), carbon dioxide (CO2), and oxygen (O2) by volume percentage. The GA5000 and BIOGAS 5000 add an optional hydrogen sulfide (H2S) channel, and the GA5000 can expand to monitor up to six gases simultaneously for sites with additional compliance parameters.
How often should landfill gas wells be monitored?
Monitoring frequency is set by each site's gas collection and control system permit, which varies by province and landfill size — typically monthly to quarterly for wellfield rounds, with more frequent checks during active gas system tuning or after any reported odour or migration complaint.
What is the difference between the GEM5000 and the GA5000?
Both measure CH4, CO2, and O2 for landfill applications. The GEM5000 calculates flow (SCFM) and calorific value in addition to composition, which suits collection-system tuning and gas-to-energy evaluation. The GA5000 is modular and upgradeable to six gas channels, which suits sites that need broader compliance-parameter coverage from one instrument.
Can a landfill gas analyzer be used for a biogas digester?
The GEM5000 and GA5000 can read digester gas composition, but the BIOGAS 5000 is purpose-built for that application — it integrates with LANDTEC's Bio Pro software to produce the calibration audit trail and documentation that carbon-credit and renewable-energy verification programs require.
Do these analyzers need to be intrinsically safe?
Yes. All three units carry ATEX certification (the GA5000 and BIOGAS 5000 also carry MCERTS and IECEx), which allows safe operation in the explosive-gas atmospheres that landfill wellfields and digester headspaces can produce.
Related articles
- Environmental Instrument Rental in Canada: What to Rent and When to Buy
- Confined Space Gas Monitoring Requirements in Canada
- Portable Gas Detectors: A Buyer's Guide for Canada
Lire en français : Équipement de surveillance des gaz d'enfouissement : guide d'achat pour le Canada
Not sure which landfill gas analyzer fits your site?
ERE Inc. has supplied environmental monitoring equipment to Canadian consultants and facility operators for 30+ years, across LANDTEC, QED, and Geotech's full landfill and biogas instrument lines.
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