Continuous monitoring
Indoor air quality monitoring — turning invisible air into actionable data
Modern IAQ monitoring stitches together sensor hardware, calibration, dashboards and alerts so building operators see — and act on — air quality the moment it changes.
LIVE PARAMETERS
- PM2.58 µg/m³
- CO₂684 ppm
- TVOC0.3 mg/m³
- Humidity47% RH
- Temp21.3°C
The monitoring stack
Four layers of a modern IAQ system
LAYER 01
Sensors
NDIR, optical PM, electrochemical & MOX gas sensors.
LAYER 02
Connectivity
LoRaWAN, Wi-Fi, BMS BACnet integration.
LAYER 03
Dashboard
Per-zone trends, baselines and alerts.
LAYER 04
Action
Demand-controlled ventilation, FM tickets, comms.
Hardware
Best indoor air quality sensors — what to look for
The best indoor air quality sensors disappear into the architecture: minimal LED, recessed mounting, OTA firmware. Inside, NDIR CO₂, laser PM, electrochemical NO₂ and MOX TVOC modules report at 1–5 minute intervals over secure mesh networks.
When we specify air monitoring sensors for UK clients we screen on five criteria: NDIR CO₂ accuracy of ±50 ppm with auto-calibration, optical PM2.5 stable to ±10%, factory-calibrated humidity and temperature, secure LoRaWAN or Wi-Fi connectivity, and a documented calibration cycle. Indicative TVOC is fine for trending; specific compounds still need sorbent-tube sampling and laboratory analysis.
Sensor placement matters as much as sensor brand — breathing-zone height, away from supply diffusers and direct sunlight. A great sensor in the wrong place tells the wrong story.
Deployment
From pilot to portfolio
- 1
Phase 01
Baseline diagnostic
2-week multi-zone deployment to surface hotspots and validate sensor placement.
- 2
Phase 02
Permanent install
Networked sensors per critical zone, integrated with BMS where available.
- 3
Phase 03
Dashboards & alerts
Custom thresholds, weekly digests, integration with Teams / Slack / FM tools.
- 4
Phase 04
Continuous improvement
Quarterly review, calibration cycle and ventilation optimisation.
Sensor selection
Specification benchmarks
| Parameter | Best-in-class accuracy | Sample interval |
|---|---|---|
| CO₂ (NDIR) | ±50 ppm | 1 min |
| PM2.5 (optical) | ±10% | 1 min |
| TVOC (MOX) | Indicative | 5 min |
| NO₂ (electrochemical) | ±15 ppb | 5 min |
| Humidity / Temp | ±2% RH / ±0.3°C | 1 min |
Build your IAQ monitoring program
From single-room diagnostics to portfolio-wide rollouts — scoped, sourced and supported.
Talk to a specialistSpecific monitoring