Outdoor & Ambient Air Quality Monitoring

Outdoor air quality monitoring is the continuous measurement of pollutants in the open air around a site, facility, or community. It captures particulate matter and gases in real time rather than through periodic sampling, so teams can see how conditions change with weather, traffic, industry, and events such as wildfires. Aethair delivers it with Aethair PRO, the Environet platform, and Noesis AI analysis.

The terms are often used interchangeably. Ambient air quality monitoring is the technical term for measuring pollutant concentrations in the general outdoor air, the air covered by standards such as the NAAQS. Outdoor air quality monitoring is the more common phrasing for the same activity. Both describe continuous measurement of particulate matter and gases in the open air, as opposed to indoor air quality monitoring inside occupied buildings.

A network places several connected monitors around a site, city, or region so readings can be compared across locations and against wind and weather. Each Aethair PRO streams its data over 4G LTE into Environet, where the network is managed as one system: shared dashboards, alerts when any node records an exceedance, and reports that draw on every station. Networks scale from a handful of perimeter units to city-wide deployments.

Particulate matter (PM1, PM2.5, PM10) and gases such as ozone, NO₂, SO₂, CO, and VOCs, alongside weather context: temperature, humidity, pressure, and wind, with wind added through a weather station on Thiamis. Aethair PRO measures the particulate fractions and the climate readings with built-in sensors and takes the gases as cartridges, so the parameter set is configured to what a site requires.

Outdoor monitoring measures ambient conditions in the open air and has to withstand the weather; indoor monitoring measures the spaces people occupy, against standards such as ASHRAE 62.1 and WELL. The two are connected, because outdoor air affects what enters a building, and many organizations pair outdoor monitoring with indoor air quality monitoring for the full picture.

Yes. Thiamis connects compatible third-party field instruments (weather stations, reference particulate monitors, gas analyzers, water probes), so existing equipment and new devices are managed and reported together in the same Environet record as the Aethair data.

Aethair PRO reports over its own 4G LTE connection, so it needs no local network, and the optional Solar Panel Bracket powers it where there is no grid power. Together they allow continuous monitoring in remote or infrastructure-limited locations.

The EPA NAAQS set limits for six criteria pollutants: particulate matter, ground-level ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead. A continuous station reads the first five in real time, with particulate matter as PM2.5 and PM10; lead is collected on filters and analyzed in a laboratory. The EU directive regulates the same pollutants and adds others, such as benzene. A general station targets the continuous set, usually with wind and weather for source attribution.

They complement rather than replace them. Reference and reference-equivalent instruments remain the basis for regulatory compliance; dense low-cost networks add the spatial resolution needed to map hotspots and inform the public, and are most reliable when co-located with a reference monitor and corrected. Most modern programs use both tiers together.

Wind speed and direction, temperature, and solar radiation govern how pollution disperses, where it travels, and (for secondary pollutants like ozone) how it forms. Without meteorology, concentrations cannot be reliably attributed to sources, and the models that interpolate between monitors have nothing to work with.

Cover particulate matter and the criteria gases (with separate instruments or one Aethair PRO carrying gas sensor cartridges), plus wind data. Use reference-grade instruments for compliance and lower-cost sensors for network coverage. Use the configurator to assemble and scale the configuration for your site or network.