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Best air quality monitor in this UK set

Updated: October 2026

UK round-ups often open on an Airthings or an Aranet that is not in this comparison. If you want one listing to open inside these 11 amazon.co.uk rows, name the job, then read which listing states the sensor. For a shut room, the top pick in this set is the BREATHE Airmonitor Plus Gen 2, because the page says NDIR and also says laser particles, with hundreds of reviews. For smoke, frying or dust, the best value is the Temtop S1, laser PM2.5 at about £31.99 with 4.4 from 748 reviews. The full price table is the [air quality monitor comparison](/hub/climate-measuring/air-quality-monitor). Products Compared did not run a lab test.

UK round-ups often open on an Airthings or an Aranet that is not in this comparison. If you want one listing to open inside these 11 amazon.co.uk rows, name the job, then read which listing states the sensor.

Our top picks

Temtop Temtop S1

Best overall

Temtop Temtop S1
8.7/10about £31.99
View offer
Temtop Temtop P600

Alternative

Temtop Temtop P600
6.9/10about £69.99
View offer
BREATHE BREATHE Airmonitor Plus Gen 2

Rank 3

BREATHE BREATHE Airmonitor Plus Gen 2
9.0/10about £99.99
View offer
On this page
  1. 1.Best for a shut room in this set
  2. 2.Best value for smoke, frying or dust
  3. 3.When another listing in the set is the one to open
  4. 4.What best means on this page

Best for a shut room in this set

A shut bedroom or a home office is a carbon dioxide question first. The number climbs even when you cannot see smoke. In this set the listing has to say NDIR, not electrochemical and not a bare CO2 claim, and it has to say a laser particle sensor, with a review count in the hundreds. That is the BREATHE Airmonitor Plus Gen 2, model BTL40001, at about £99.99, with 4.0 from 457 reviews. HSE describes NDIR as the appropriate type for portable workplace CO2 checks. Approved Document F Volume 2 expects NDIR and mains power in specified new non-domestic rooms. This unit is not that monitor. Portable use is up to 6 hours, then USB-C. Skip it if you need all-day use with no cable, a budget under about £40, or a landlord carbon monoxide alarm. Carbon monoxide is not on this listing. Sensor detail sits on the air quality monitor buying guide.

Best value for smoke, frying or dust

When the question is the pan, the candle or dust, you need laser PM2.5 and a large review file, not a CO2 sensor. The Temtop S1 states laser PM2.5, temperature and humidity. It does not list CO2, VOC or formaldehyde. ECO is stated at 60 days and A mode at 20 days, and the listing tells you to leave the meter plugged in for real-time monitoring. UK reviewers say ECO mode misses a short spike. Use live mode for the minute a stove door opens or a pan smokes. Skip the S1 if you wanted a fresh-air number. Where to stand the meter is on how to use an air quality monitor.
Temtop Temtop S1

Testsieger

Temtop Temtop S1
8.7/10about £31.99
View offer

When another listing in the set is the one to open

The Amazon Smart Air Quality Monitor at about £69.99 is the one to open for an Alexa routine: PM2.5, VOC, a carbon monoxide factor, humidity and temperature, with announcements on an Echo. The five factors do not include CO2, and that carbon monoxide factor is not a legal alarm. The saved listing has no star line. Open the Temtop P600 at about £69.99 for PM10 as well as PM2.5 and a histogram of the last 12 hours. It is particles only, 4.4 from 153 reviews, and an electrochemical attribute conflicts with the laser bullet. Open MOESAPU at about £79.99 only for infrared CO2 at 0–9999 ppm, and only if you accept 4.0 from one review. Do not read infrared as NDIR.

What best means on this page

The Temtop M100 2nd at about £159.99 is 3.8 from 10 reviews, with the CO2 type unstated. A 5.0 from one, two or seven reviews does not outrank the files above. A qualifying purchase can earn us a commission at no extra cost to you. Listings were read on 15 October 2026. This page is from the Products Compared editorial team.

Common questions

What is the best air quality monitor if the room feels stuffy?
In this set, open the BREATHE Airmonitor Plus Gen 2. The listing states NDIR carbon dioxide and a laser particle sensor, at about £99.99, with 4.0 from 457 reviews. Named NDIR is the criterion, not the cheapest CO2 claim. Skip it for all-day use away from USB, because portable life is stated at up to 6 hours. A particle-only Temtop cannot answer a fresh-air question.
What should you buy if you only care about cooking smoke or dust?
Open the Temtop S1 at about £31.99. It states laser PM2.5 and has 4.4 from 748 reviews, the deepest particle file here. It does not measure CO2. Put it in real-time mode for the few minutes the pan smokes, because ECO sampling can miss that spike. The P600 is the alternative if you also want PM10 and a 12-hour histogram.
Is the cheapest meter the best value?
Bekasa at about £16.99 is the lowest shelf price, and it is not the best-value pick. It states electrochemical CO2, averages 3.1 from 199 reviews, and does not list PM2.5. Best value here means laser PM2.5 with the largest review count, which is the Temtop S1 at about £31.99. The S1-up is about £6.50 less and has 133 reviews rather than 748.
Why not the meter with 5.0 stars and two reviews?
Nobito is 5.0 from two reviews, GoHelmate is 5.0 from one, and DisRun is 5.0 from seven. A perfect average on a handful of reviews mostly means few people have written anything yet. Use the count beside BREATHE’s 4.0 from 457 and the S1’s 4.4 from 748. Do not promote a two-review listing over those files.
Should an Alexa household buy the Amazon monitor?
Buy it if the job is a routine: PM2.5, VOC, a carbon monoxide factor, humidity and temperature, with notifications on a phone or an Echo. Do not buy it for a shut room. CO2 is not one of the five factors. The saved listing has no star line. The carbon monoxide line is not a landlord alarm.
Does best here mean a lab test?
No. Products Compared did not run a chamber test, and this is not a UK-wide ranking of Airthings, Aranet or any model outside these 11 listings. Best means the listing that states the sensor for a named job and has a review file large enough to read. Winners on other UK review sites are not rows in this table, so they are not given prices here.

Related pages

PM2.5 or CO2

Air quality monitor for a wood burner

Air quality monitors

Air quality monitor buying guide: sensors and power

How to use an air quality monitor in your UK rooms

Sources

Public UK and international sources used for this comparison. Listing prices are from amazon.co.uk on 15 October 2026.

  1. GOV.UK — ventilation and air quality in education and childcare settings (retrieved 15 October 2026)
  2. Approved Document F Volume 1 (2026) — ventilation (retrieved 15 October 2026)
  3. Approved Document F Volume 2 — buildings other than dwellings (retrieved 15 October 2026)
  4. WHO global air quality guidelines 2021 (retrieved 15 October 2026)
  5. WHO indoor formaldehyde guideline, 0.1 mg/m³ over 30 minutes (retrieved 15 October 2026)
  6. The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (retrieved 15 October 2026)
  7. GOV.UK — radon (retrieved 15 October 2026)
  8. Defra Daily Air Quality Index — PM2.5 (retrieved 15 October 2026)