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IQAir · IQAir Air Quality Monitor Indoor, Swiss Design, Professional Grade, Detects PM2.5, CO2, AQI, Temperature, Humidity, Indoor Air Quality Real-Time Air Quality & Forecasting, Historic Data
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The IQAir AirVisual Pro is the monitor to choose when you want particulate and CO2 readings in the same place, with a display you can read across a room and historical data pushed to an app. Its laser particle sensor is the centre of the product: a fan draws room air past a focused light beam and a photodiode counts the flashes, which is how it reports PM2.5. The listing does not publish the CO2 sensor type, the PM2.5 measurement range, the accuracy figures or the logging interval, so treat the numbers on screen as indicative of trend rather than as a calibrated reference. If you need a cleanroom-grade particle counter with six size channels, this is not that instrument.
The laser inside: how the AirVisual Pro counts particles
Most of what the AirVisual Pro reports about particulates starts with a small laser and a photodiode. The listing describes “high-precision laser air quality sensor technology” and names PM2.5, smoke, dust and “other fine hazardous particles” as targets. The mechanism behind that description is well established in this class of instrument: a fan pulls a sample of room air through a narrow channel, a laser beam crosses the channel, and any particle passing through the beam scatters light. The photodiode sees a flash for each particle, and the firmware counts flashes over a fixed period and converts the count to a mass concentration in micrograms per cubic metre.
Two practical consequences follow. First, the sensor is optical, not gravimetric: it estimates mass from scattered light, so it responds differently to smoke, dust and humidity than a filter-based reference method would. Second, the sample is drawn from wherever the box is sitting, so placement decides what the laser sees. A monitor on a shelf above a radiator reads a different aerosol than one at breathing height in the middle of the room. The listing does not publish the PM2.5 measurement range, the resolution, or the accuracy figure for the particle channel, so the concentration on screen should be read as a trend and a relative signal, not as a compliance measurement.
CO2, temperature and humidity: the other channels and what they add
The listing names carbon dioxide alongside PM2.5, and adds temperature and humidity. CO2 is measured by a different sensing element from the particle channel, typically a non-dispersive infrared cell in instruments of this type, though the listing does not state the sensor type. What the CO2 number tells you is occupancy and ventilation: humans exhale CO2, so a rising reading in a closed room is a signal that fresh air is not reaching the space. That is a different question from the particle reading, which is about what is suspended in the air. Having both on one screen is the main reason to choose this monitor over a particulate-only unit.
Temperature and humidity matter to the interpretation more than to the headline. Humidity affects how some optical particle sensors respond, and the listing does not publish a correction scheme. The listing also does not publish the CO2 measurement range, the temperature range, the humidity range or the accuracy of any of these channels. If you need documented accuracy for a compliance or commissioning job, the published data here is not enough to support that use.
Alerts, history and the app: what the data path actually does
The listing states that the monitor reports historical indoor AQI, temperature and humidity, and that it provides health advice customised to your air quality. It also states that alerts are customizable and fire when conditions pass a threshold you set. The mechanism is straightforward: the firmware compares the current reading against the threshold, and the app or the device notifies you. What the listing does not publish is the logging interval, the retention period for historical data, or whether the history can be exported as a file. If your reason for buying is a record you can hand to somebody else, check those points before you buy; the listing is silent on all three.
Connectivity is stated as Wi-Fi, with setup through the IQAir smartphone, tablet or desktop app. Power is stated as rechargeable via an electrical outlet or USB port. That combination makes the monitor a mains-first device that can be moved without immediate rewiring, but the listing does not publish battery runtime, so do not assume it will run unattended for a defined period.
What the listing does not publish, and why each gap matters
The gaps are worth listing plainly because they decide whether the instrument fits a job.
- CO2 sensor type and range: not stated in the listing bullets. Without a range you cannot know whether the display saturates in a poorly ventilated room.
- PM2.5 range and accuracy: not stated. The laser mechanism is described, but no figure is given for the lowest detectable concentration or the tolerance.
- Temperature and humidity accuracy: not stated. These channels are useful for context, but not for calibration work.
- Logging interval and export: not stated. History is mentioned, but not the sample rate or whether a file can be produced.
- Battery runtime: not stated. Rechargeable power is mentioned without a duration.
- Calibration: not stated. No calibration interval or method is published, which matters for any long-term deployment.
None of these gaps is unusual for a consumer-facing monitor, but each one changes what the instrument is good for. An indoor monitor used to spot a ventilation problem does not need a published accuracy figure. A monitor used to document a building does.
Where the AirVisual Pro stops being the right answer
The AirVisual Pro is an indoor trend monitor. It is not a cleanroom particle counter: the listing names no size channels beyond PM2.5, and a six-channel 0.3 to 10 micron instrument such as a dedicated particle counter is the correct tool when you need to classify a space. It is not a reference CO2 analyser either, because the listing publishes no accuracy figure for the CO2 channel. And it is not a substitute for a calibrated data logger when the record has to stand up to scrutiny; if that is the requirement, start from how to choose an air quality data logger rather than from a display-first monitor.
For the jobs this monitor is actually built for, the mechanism is the argument. A laser particle sensor and a CO2 channel in one box, with a display and an app, let you watch a kitchen during cooking or a bedroom overnight and see the two signals move independently. That is enough to decide whether to ventilate, filter or both. For the wider category, see the best air quality monitors; for the specific question of what the AQI number on screen means, see how to interpret AQI on an indoor air monitor.
The mechanism is sound; the published data is thin
The IQAir AirVisual Pro is a well-conceived indoor monitor: a laser particle sensor, a CO2 channel, temperature and humidity, a readable display and Wi-Fi history in one enclosure. The mechanism behind the particulate reading is the right one for indoor use, and putting CO2 beside PM2.5 is genuinely useful because the two answer different questions. The limitation is documentation. The listing does not publish the CO2 sensor type, the PM2.5 range or accuracy, the temperature and humidity accuracy, the logging interval, the battery runtime or the calibration method. Buy it as a trend and alert instrument for a home or a small workspace, not as a calibrated reference. If you need published accuracy or exportable records, the listing does not give you enough to decide, and you should look at instruments that publish those figures.
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Frequently Asked Questions
Does the AirVisual Pro measure CO2 directly or estimate it?
The listing states that the monitor detects CO2 alongside PM2.5, temperature and humidity, and describes professional-grade pollutant sensors. It does not state the sensor type or the measurement range. CO2 in indoor monitors is normally measured with a dedicated sensing element rather than estimated from other readings, but the listing does not publish enough to confirm the method here, so treat the CO2 channel as a stated feature without a published accuracy figure.
How accurate is the PM2.5 reading?
The listing does not publish an accuracy figure, a measurement range or a resolution for the particle channel. It describes high-precision laser sensor technology and names PM2.5, smoke, dust and other fine particles as targets. Without a published tolerance, the number on screen is best used as a relative signal and a trend, not as a compliance measurement.
Can I export the historical data?
The listing states that the monitor reports historical indoor AQI, temperature and humidity, and that data is viewable through the IQAir app. It does not state whether the history can be exported as a file, what the logging interval is, or how long data is retained. If an exportable record is a requirement, the listing does not confirm it.
Does it run on battery, and for how long?
The listing states that the device is rechargeable via an electrical outlet or USB port. It does not publish a battery runtime or a battery capacity. The monitor should be treated as a mains-first device that can be unplugged and moved, not as a unit with a stated untethered operating time.
Is this a particle counter for cleanroom classification?
No. The listing names PM2.5 and fine hazardous particles, but publishes no size channels, no count mode and no sampling flow rate, which are the figures a cleanroom classification depends on. A dedicated six-channel particle counter is the right instrument for that job; the AirVisual Pro is an indoor trend monitor.
Does it detect carbon monoxide or radon?
The listing does not name carbon monoxide or radon among the detected parameters. It names PM2.5, CO2, smoke, dust and other fine particles, plus temperature and humidity. A monitor of this kind is not a substitute for a dedicated CO alarm, and the listing makes no such claim.
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