Multi-sensor monitor (radon, PM2.5, CO2)
Airthings View Plus Radon & Air Quality Monitor
A seven-sensor indoor air quality monitor — radon, PM2.5, NDIR CO₂, VOCs, humidity, temperature and air pressure — with an e-paper display and Wi-Fi reporting to the Airthings app.
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Best for
One monitor for cooking particulates, CO₂, humidity and radon together
Specifications
| Measures | Radon, PM2.5, CO₂, total VOCs, humidity, temperature, air pressure |
|---|---|
| CO₂ sensor | NDIR, 400–5,000 ppm; ±50 ppm ±3% (50–95 °F, 0–80% RH, after ~7-day initial calibration) |
| PM2.5 sensor | Laser-scattering optical particle counter, 0–1,000 µg/m³; ±(5 µg/m³ + 15%) below 150 µg/m³ |
| Radon | Passive diffusion chamber, alpha spectrometry, 0–500 pCi/L; ~10% after 7 days, ~5% after 2 months (at 5.4 pCi/L) |
| VOCs | Total VOCs in ppb (~7-day initial calibration) |
| Sampling | Every 5 minutes |
| Display | 2.9 in e-paper with red/yellow/green glow indicator |
| Power | 6 × AA (up to 2 years, depending on router and interval) or USB-C |
| Connectivity | 2.4 GHz Wi-Fi and Bluetooth LE; free Airthings app required for setup |
| Warranty | 1 year (North America); free 5-year extension when registered within 30 days |
Specifications as published by Airthings. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.
What's good
- Measures PM2.5 with a laser particle counter, so a seared steak or a wildfire-smoke day shows up as a real particulate number
- NDIR CO₂ — measured, not estimated — alongside humidity in the same reading
- Continuous radon monitoring, which no CO₂ monitor or hygrometer offers
What's not
- Radon and CO₂ need days before the readings settle — Airthings quotes radon accuracy after 7 days and a ~7-day initial calibration for CO₂ and VOCs
- The VOC figure is a total for a mix of chemicals, not a measurement of any specific one
- Does not detect carbon monoxide or nitrogen dioxide — a gas range still needs a CO alarm, and the monitor is no substitute for one
- Not for bathrooms: Airthings says spaces above 85% humidity can permanently damage the radon sensor
Our verdict
The pick when you want one device to answer several of our guides at once. It shows what the gas-stove and electrification guides describe — cooking makes PM2.5 on induction as well as gas — and whether the range hood is actually clearing it, while the NDIR CO₂ and humidity readings cover the stuffy-room questions. Radon is the reason to choose it over a CO₂-only monitor: it is independent of fuel choice and only shows up with days of continuous data, so treat the first week as warm-up and judge radon on the long-term average, not a single day's reading.
Compare with the alternatives
- Aranet Aranet4 HOME — finding out whether a stuffy room is short of fresh air
- Govee Bluetooth Hygrometer Thermometer H5075 — knowing your real indoor humidity, and tracking it across a season