Calibrated gas flow measurement for biogas, landfill gas, and anaerobic digester projects. What to look for, what we recommend, and how to meet methodology accuracy requirements.
For biogas, landfill gas, anaerobic digester and cookstove projects, accurate flow measurement is central to your MRV methodology. Thermal mass flow meters are the standard — they measure mass flow directly without needing additional temperature or pressure compensation, and they handle the wet, dirty conditions typical of biological gas sources.
Verification bodies expect NIST-traceable calibrated instruments. Make sure any meter you purchase ships with a calibration certificate, and budget for recalibration at intervals required by your methodology — typically every 12 months.
The industry benchmark for portable methane measurement. Measures across a wide operating range — 1% to 100% of full scale — with sub-10ms response times and accuracy to ±0.8% of reading. Anticorrosive construction handles the wet, dirty conditions of biogas and landfill gas environments. Widely used by monitoring contractors on EPA and Verra-regulated projects worldwide.
Alicat meters ship with NIST-traceable calibration certificates as standard — important for Gold Standard and Verra VCS MRV submissions where auditors will ask to see instrument documentation.
Purpose-built for biogas and digester gas monitoring. Handles the wet, corrosive mixed-gas environment of anaerobic digesters — typically 70% methane, 30% CO₂ with H₂S traces. Features CAL-V calibration validation so you can verify the meter is still in original calibration without removing it from the pipe, which is valuable for continuous monitoring projects requiring audit trails.
The CAL-V feature allows you to demonstrate calibration integrity to a VVB without interrupting monitoring — important for projects where continuous data coverage is a methodology requirement.
A thermal time-of-flight meter for methane and natural gas at a more accessible price point. Uses MEMS sensor technology inside a laminar flow channel — highly accurate at low flow rates without needing external compensation. Good for smaller projects during development and feasibility phase before committing to full MRV instrumentation.
More accessible price for early-stage monitoring. Suitable during feasibility and project development phases, or for smaller projects where a lower-cost instrument still meets methodology accuracy thresholds.
Use our calculators to plan your project before you invest in field equipment.