https://www.newequipment.com/product-news/controls-instrumentation/article/21256295/qed-environmental-systems-new-technology-for-surface-emissions-monitoring-tunable-laser-spectroscopy
New Technology for Surface Emissions Monitoring: Tunable Laser Spectroscopy | New Equipment Digest
Lightweight device filters out other VOCs so they don't affect methane concentration readings.
surface emissions monitoringnew technologylaser spectroscopyequipmentdigest