A year-long comparison at a landfill in Oklahoma confirmed that headerMonitors deliver highly accurate and consistent gas measurements. When compared to site gas chromatograph data, methane readings differed by just 0.36%, with minimal variation in CO₂ and O₂. With automated calibrations about every three days and very little sensor drift, the headerMonitor maintained stable, reliable performance over time. The results show that operators can confidently rely on headerMonitor

From January to June 2025, readings from 20 Apis smartWells deployed at a landfill in Arkansas were compared to standard handheld instrument readings to confirm device accuracy. The results showed that smartWells provide highly precise and consistent measurements of methane, carbon dioxide, oxygen, flow, pressure, and temperature. With automated calibrations averaging every 1.12 days and advanced outlier detection, the devices demonstrated minimal sensor drift and stable long

At one of our Pennsylvania sites, Apis headerMonitors were used to quickly detect an oxygen leak and help the team respond swiftly.

See how Vancouver Landfill boosted methane flow by 12% and cut emissions by 17,445 tonnes with Apis smartWells.