PM2.5 · PM10 · airborne particle monitoring
Indoor particulate monitoring for UK buildings
Continuous PM2.5, PM10 and ultrafine particle monitoring. Networked optical sensors track outdoor ingress, indoor sources and HVAC filtration performance — all on one dashboard.
Why monitor
PM2.5 concentration bands we monitor against
Fine particulates (PM2.5) penetrate deep into the lungs and bloodstream. The 2021 WHO guideline tightened the 24-hour mean to 15 µg/m³ — most UK urban indoor environments breach this without intervention.
<5 µg/m³
Meets WHO annual guideline.
5–15
Within WHO 24-hour guideline.
15–35
Sensitive occupants affected.
>35
Filtration / source control required.
Optical particle sensors
Laser scattering sensors resolve PM1, PM2.5 and PM10 in real time.
Ingress vs indoor sources
Indoor-outdoor comparison identifies whether HVAC filtration or local sources dominate.
Filter performance
Sensor data validates MERV / ePM filter selection and replacement schedules.
Wildfire & construction alerts
Automated alerts during ambient pollution events or nearby site work.
Use cases
Where indoor particulate monitoring delivers value
Urban offices with traffic ingress, schools near busy roads, healthcare estates with strict cleanliness targets, and any building running a healthy-building certification. Construction-adjacent sites and post-incident buildings (fire, flood, smoke) are also routine drivers.
Combine with indoor air quality monitoring, HVAC air quality monitoring and continuous air quality monitoring.
Benchmarks
WHO and certification thresholds for PM
| Reference | PM2.5 | PM10 |
|---|---|---|
| WHO 2021 (annual mean) | 5 µg/m³ | 15 µg/m³ |
| WHO 2021 (24-hour mean) | 15 µg/m³ | 45 µg/m³ |
| WELL Building Standard | <15 µg/m³ | <50 µg/m³ |
| RESET Air (high performance) | <12 µg/m³ | <50 µg/m³ |
| UK AQS objective | 20 µg/m³ | 40 µg/m³ |
Roll out indoor particulate monitoring
Networked PM2.5 / PM10 sensors with live dashboards and alerting — site-wide or single zone.
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