Best 2021 Air Purifiers for PM2.5 detection

#1 Dyson Purifier Hot+Cool Formaldehyde, HP09
5.0

Video testing showed PM2.5 readings rising during smoke tests and being treated as meaningful by the reviewer.

Pros: dust removal, PM2.5 detection

Cons: mold spore reduction, durability

#2 PuroAir 240
5.0

PM2.5 testing is positive in the main video review, where readings dropped quickly during a controlled particle test.

Pros: particle removal effectiveness, dust removal

Cons: CADR rating, air changes per hour

#3 Coway Airmega 250S
4.8

PM2.5 detection evidence was positive in PCMag testing, where the purifier immediately surfaced a high PM2.5 reading.

Pros: pre-filter quality, room coverage

Cons: fan speed options, filter replacement cost

#4 Dyson Purifier Cool Formaldehyde TP09
4.7

PM2.5 detection is supported by expert testing showing quick detection and response to particle spikes.

Pros: allergen reduction, smoke removal

Cons: customer support, reliability

#6 Levoit 400S
4.4

PM2.5 detection was broadly useful, with reviewers liking real-time PM2.5 readings, external-meter alignment and app-based monitoring.

Pros: ozone-free operation, build quality

Cons: VOC sensor accuracy, washable pre-filter

#7 Levoit Core 300S
3.9

PM2.5 detection was useful overall, especially for visibility and response, but some reviewers found the presentation unclear or delayed.

Pros: ozone-free operation, safety certifications

Cons: VOC sensor accuracy, handle design

#8 Dyson Purifier Cool Gen1 TP10
3.5

2 reviews provide opinionated evidence for PM2.5 detection.

Pros: overall satisfaction, real-time air quality monitoring

Cons: VOC sensor accuracy, customer support

#9 Dyson Purifier Cool TP07
2.5

Evidence for PM2.5 detection appears in the listed reviews; scores reflect whether each source praised, criticized, or qualified that trait.

Cons: customer support, reliability

#10 Honeywell HPA830W
2.0

One expert criticizes the sensor choice because the unit has a VOC sensor rather than PM2.5 detection.

Pros: dust removal, pollen removal

Cons: app connectivity, remote control