Particle monitors split into two families that are easy to confuse: a mass monitor reports micrograms per cubic metre as PM2.5 or PM10, which is how health guidance is written. A counter reports how many particles of each size passed the sensor, which is how filtration and cleanroom work is specified. This hub sorts nine listings by the channels each manufacturer actually publishes.
Count the Dust
Find the Source
Filter It Out
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Instruments were sorted by the particle size channels each manufacturer listing actually publishes, whether the output is a mass concentration or a count, what other parameters share the same screen, and whether readings can be logged or exported. We did not run laboratory tests and publish no measurements of our own. Where a listing gives no figure the entry reads Not stated.
PM2.5 alongside carbon dioxide, climate and a health index, with logging stated.
Six published size channels starting at 0.3 micron, which is filtration language rather than health language.
Two mass channels, nothing else, and no derived numbers to misread.
No pick matches that combination yet. Try a wider budget or a different measurement.
| Product | Type | Particle channels stated | Other stated parameters | Logging | |
|---|---|---|---|---|---|
| Extech IAQ320 | Air quality meter and datalogger | PM2.5 | CO2, air temperature, relative humidity, health index | Datalogger stated | View |
| 6-channel air particle meter | Particle counter | 0.3, 0.5, 1.0, 3.0, 5.0 and 10 micron | Not stated | Not stated | View |
| Portable handheld particle counter | Particle counter | Not stated | 2000 mAh battery, ABS body | Not stated | View |
| BLATN Smart 126s | Multi-parameter monitor | PM2.5 | TVOC and formaldehyde | One reading per minute, export stated | View |
| SCULPRIV 8-in-1 monitor | Multi-parameter monitor | PM1.0, PM2.5 and PM10 | HCHO, TVOC, AQI, temperature, humidity | Not stated | View |
| Sainlogic 16-in-1 monitor | Multi-parameter monitor | PM1.0, PM2.5 and PM10 | CO2, HCHO, TVOC, AQI, nine parameters and seven alerts | Not stated | View |
| FABISENSE PM2.5 and PM10 monitor | Mass particulate monitor | PM2.5 and PM10 | Not stated | Not stated | View |
| Amazon Smart Air Quality Monitor | Connected room monitor | PM2.5 | Temperature, humidity, carbon monoxide, VOC | App history and voice readout stated | View |
| AirKnight 10-in-1 monitor | Multi-parameter monitor | Not stated | CO2 and VOC named on the listing | Not stated | View |
Every figure here is taken from the manufacturer listing for that product at the time of research. The AirKnight listing describes ten indices but does not name its particle channels, so that cell reads Not stated rather than an assumption. Nothing on this page is a measurement of ours.
Four questions settle the purchase:
Counts per size channel suit filtration and extraction work. PM2.5 and PM10 mass readings suit health guidance and room comparisons. Only one listing here publishes a full channel list.
A sixteen index display usually rests on three or four physical sensors. Channels that always move together are one sensor reported several ways, not independent measurements.
The Extech IAQ320, the BLATN 126s and the Amazon monitor are the three that state logging or history. Without it, a spike you did not witness never happened.
Particle levels change in minutes. Leave the instrument in one place for a full day before drawing conclusions, and record what was happening in the room at each spike.
Three of the products supplied with this topic are air purifiers: two pet models and one large room unit. A purifier changes the air rather than measuring it, and the indicator light on a purifier is not an instrument reading you can compare with anything. They were dropped so that all nine rows in the table are genuine measuring devices.
A counter reports how many particles of each size passed through the sample, which is how filters and clean spaces are specified. A PM monitor reports an estimated mass per cubic metre in two or three size fractions, which is how health guidance is written. The six-channel meter here is a counter; most of the others are mass monitors.
Cautiously at best. Optical sensors in this price class estimate mass from scattered light using assumptions about particle density and shape, and none of these listings publish a calibration reference. The readings are a strong signal for change within your own room and a weak signal for compliance with any published figure.
Because it should. Frying, toasting, candles, wood burners, sanding and vacuuming with a poor filter all generate fine particles in quantity, and a working sensor responds within seconds. A monitor that stays flat through a cooking session is the one to be suspicious of.
It can. Optical sensors respond to droplets as well as solids, so steam from a kettle, a shower or a humidifier can produce a spike that is water rather than pollution. Watching humidity on the same screen, which the Extech IAQ320 and the multi-parameter monitors allow, is the simplest way to tell the two apart.
A particle reading on its own rarely identifies a source. PM2.5 climbing while carbon dioxide stays flat points at combustion or dust; both climbing together points at a closed room full of people; PM2.5 climbing while humidity spikes usually points at a kettle or a shower. This meter puts all four on one screen simultaneously, which is why it takes the top slot even though it states fewer parameters than several cheaper units.
The listing states simultaneous measurement and display of PM2.5, carbon dioxide, air temperature, relative humidity and a health index, plus datalogging. Simultaneous is the word that matters. A monitor that cycles through parameters on one display cannot show you a correlation, and correlation is how a source gets found.
What the listing does not publish is the particle sensor type, the size range it actually responds to, a mass accuracy figure, the logging interval or the memory depth. Optical mass sensors are calibrated against an assumed particle density and refractive index, so absolute micrograms per cubic metre from any instrument in this class should be treated as indicative. Use it to compare one hour against another in the same room, not to compare your room against a published limit.
This is the only listing on the page that tells you exactly what it is looking at. Six channels are stated: 0.3, 0.5, 1.0, 3.0, 5.0 and 10 micron. That is the vocabulary of filtration and cleanliness work rather than health guidance, and it answers a question no PM2.5 display can. If you have fitted a filter, a counter shows what passed through it at each size, and the 0.3 micron channel in particular is the one filter performance is specified against.
The practical uses are narrower than a room monitor but sharper. Checking that a workshop extraction system is doing anything. Comparing a room before and after a purifier runs. Finding out whether sanding, cutting or a tumble dryer is the actual source of a dust complaint. Counts move dramatically and quickly, which makes cause and effect visible in minutes.
The listing does not state a flow rate, a sample volume, a counting efficiency or a calibration reference, and those four omissions matter more here than anywhere else on this page. Counts per unit volume cannot be compared between instruments unless the sample volume is known, so treat the numbers as a strong relative signal within your own work and not as a figure anyone else can verify.
Most households asking about particles are asking one question: is the cooking, the wood burner or the road outside putting something in the air. Two numbers answer it, and this listing publishes exactly those two. PM2.5 covers the fine fraction that stays airborne and reaches deep into the lungs, PM10 covers the coarser fraction that includes most visible dust, and the ratio between them says something useful about the source.
Buying narrow has a real advantage here. A sixteen parameter monitor derives most of its display from three or four sensors, and the derived channels move together in ways that look like information and are not. A two channel PM monitor cannot mislead you that way, because both numbers come from the same optical sensor doing the job it was built for.
The listing publishes no sensor model, no measuring range, no accuracy figure and no logging. Portable is stated, which implies a battery, but capacity and runtime are not given. As with every optical particle sensor in this class, the absolute micrograms figure depends on assumptions about the particles being measured, so use it to compare before and after rather than against a published health limit.
Short answer: the Extech IAQ320 is the best general buy because it states PM2.5, carbon dioxide, temperature and humidity measured simultaneously with logging, which is what identifies a source; the six-channel particle meter is the one to buy for filtration and extraction work, since it is the only listing here that publishes its channels from 0.3 micron up; and the FABISENSE PM2.5 and PM10 monitor is the value pick for a home.
Every instrument on this page shines a light through a sample of air and watches what scatters, but they report the result in two incompatible ways. A counter says how many particles crossed the beam in each size band, which is the language of filter performance, cleanroom classification and extraction testing. A mass monitor converts the same scattering into an estimated weight per cubic metre and reports it as PM2.5 or PM10, which is the language of health guidance and weather apps. Neither converts reliably into the other, because the conversion depends on what the particles are made of. Decide which question you are asking before comparing models, because a counter will frustrate anyone who wanted a familiar PM2.5 figure and a PM monitor is useless for checking a filter.
The sainlogic and SCULPRIV listings claim large numbers of parameters, and this is worth understanding rather than dismissing. One optical particle sensor produces PM1.0, PM2.5 and PM10 from a single measurement by binning the same scattering data. One metal oxide sensor typically produces TVOC and often formaldehyde and sometimes an estimated carbon dioxide. One combined chip produces temperature, humidity and dew point. An algorithm then produces AQI from the rest. That is four sensors and a dozen readouts. The readings are not fabricated, but they are not independent either, so a formaldehyde channel that tracks the TVOC channel exactly is telling you about one sensor twice. A dedicated formaldehyde detector exists for that reason.
Two rows here are counters and only one publishes its channels. The six-channel meter states 0.3, 0.5, 1.0, 3.0, 5.0 and 10 micron. The other handheld counter states a 2000 mAh battery and an ABS body and no measurement specification at all, which is a fair summary of how this end of the market is sold. Neither publishes a flow rate or a sample volume, and without those a count cannot be compared with anyone else numbers, because a count is always per unit of air sampled. That does not make them useless. Running one before and after a filter change, or with extraction on and off, produces a difference that is unambiguous even when the absolute number is not.
Particle levels move in minutes and the interesting events usually happen when nobody is watching the screen. Three listings state some form of history: the Extech IAQ320 states a datalogger, the BLATN Smart 126s states data storage and export with a one minute logging interval and a stated maximum record count, and the Amazon Smart Air Quality Monitor states app history with a voice readout. Everything else shows a live number and forgets it. If the purpose is to work out what is happening overnight, during a commute or while a workshop runs, buy logging before you buy extra parameters. Exporting and reading monitor data covers what to do with the file afterwards.
Nothing in this group publishes an accuracy specification, and that should shape how the readings are used. Two instruments of the same model in the same room routinely differ, and the same instrument reports differently for candle smoke and road dust at identical true concentrations because it assumes a particle density. The safe approach is comparative: keep the instrument in one position, record what was happening at each spike, and judge changes rather than absolutes. Humidity deserves particular suspicion, since steam reads as particulate on an optical sensor, which is why watching relative humidity on the same screen is worth more than an extra derived index. Whether a humidifier affects particle readings goes into that directly.
Listings were compared on the particle size channels published, whether output is a count or a mass concentration, the other parameters on the same display, logging and export, and what the listing left unstated. Owner feedback was reviewed for recurring reports of implausible readings, sensors that stick at one value and units that fail early. We did not run laboratory tests, we publish no measurements of our own, and no figure appears on this page unless the manufacturer published it. Amazon data supplies images, availability and links only.
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