AirVisual Pro

If you worry about what’s in the air you breathe at home or work — smoke, fine particles or elevated CO2 that leaves rooms stuffy — this monitor turns guesswork into answers. It’s aimed at homeowners, parents and small-office managers who need continuous, easy-to-read indoor air metrics plus context from outside air data. ## What makes it worth it The AirVisual Pro uses a laser particle counter to report PM2.5 with high sensitivity (detects fine particles in the 0.3–2.5µm range) alongside an industrial-grade CO2 sensor that reads roughly 400–10,000 ppm, so you get both pollutant and ventilation data, not just temperature. A bright 5" colour display gives you immediate visual cues and numerical detail, and the unit links to IQAir’s app and global network to show three-day outdoor forecasts and government-station data — useful when deciding whether to open a window or run a purifier. ## Where it falls short The AirVisual Pro is an older, premium-priced device compared with newer compact monitors that bundle VOC sensing or sleeker apps; the price (often several hundred pounds) feels high if you only want a basic PM2.5 readout. Buy this if you want a large, trustworthy indoor monitor that also gives outdoor context and CO2 alerts; skip it if you only need a cheap PM sensor or want integrated VOC sensing at a lower price.

£294