Your boundary gas probes, read around the clock instead of once a quarter.
Cairn Sensing mounts solar and battery-powered methane sensors on the gas probes your closed landfill already has, and reports around the clock over cellular, with satellite where there’s no signal.
Free 90-day pilot. No cost, no long-term commitment.
Quarterly readings miss what happens in between
Most closed landfills check perimeter gas probes by hand a few times a year. A technician drives out, reads each probe and logs the number. That reading is accurate for the minute it was taken.
Landfill gas migration doesn’t keep that schedule. Pressure changes, wet seasons and failing cover can push methane toward the property boundary for days or weeks between visits, and nobody knows until the next round, or until a neighbor calls.
In Washington, landfill methane is covered by the state’s landfill methane rule (WAC 173-408) alongside the solid waste rules for gas monitoring. Oregon has its own landfill gas emissions rules. Continuous probe data gives you a record of what happened between required readings, not just on the day of them.
How Cairn fits
- Uses your existing probesSensors attach to the boundary gas probes already in the ground. No new wells, trenching or grid power.
- Solar and batteryEach unit powers itself, so it works on remote closed sites with nothing on them.
- Cellular, with satellite fallbackReadings go out over cellular and switch to satellite where there’s no signal.
- Alerts at your thresholdYou set the level. When a probe crosses it, you hear about it then, not next quarter.
- Reports in one clickA clean history per probe to support the readings and records you already keep.
How a pilot works
We start with a 15-minute call about your site, what you monitor today and where readings come from.
If it’s a fit, we install a small number of sensors and run them for 90 days at no cost. You get the alerts and the data, and at the end you decide whether it’s worth keeping.
Cairn’s sensors add continuous data alongside your required monitoring. They don’t replace it unless your regulator agrees they can.