Amazon Smart Air Quality Monitor review
Particulate readings in an Alexa household, at a price that regularly drops a long way below list.
By Tom Calder · Updated 24 July 2026 · Price checked against our tracker
The only monitor here with a carbon monoxide sensor, which makes it the one most easily misread as a safety device. Amazon's own documentation states it is not certified as a CO alarm or detector and is not a substitute for one, and its stated CO accuracy of ±5 ppm or ±30% with a baseline offset under ±10 ppm means it may register nothing at the low, sustained levels a certified EN 50291 alarm exists to catch. As a cheap PM2.5 and VOC-trend sensor for an Alexa home it is fine; it measures no CO2 at all.
£69.99 is the standard UK price on Amazon.co.uk, but this one is discounted often and heavily — it has been seen around £39.99 during Amazon's own promotional events. If you are not in a hurry, it is a device worth waiting for a sale on rather than buying at list price.
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- Measures PM2.5, which most rivals near this price do not
- Alexa voice readouts and routines with no extra hub or bridge required
- List price £69.99 but discounted often and heavily — it has been seen around £39.99
- Not certified as a CO alarm and not a substitute for one, per Amazon's own documentation — you still need a separate EN 50291 alarm
- No CO2 measurement at all, so it is no help whatsoever with ventilation
- Mains-only with no battery and no screen: it stops in a power cut and every reading lives in the Alexa app
Key specs
| Measures | PM2.5, VOCs (low/med/high), CO, humidity, temp. No CO2, no radon. |
| Display | No screen — one status LED; all readings live in the Alexa app |
| Connectivity | Wi-Fi and Bluetooth; Alexa app, Echo voice readouts and routines |
| Power | Mains USB only — no battery, so it stops in a power cut |
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