Design
The AETHON Air Quality Monitor (AQM) is offered in two standard compact designs.
The design can be also customized by 3D-printing or crafting.
Desktop Design
Compact cube with side length 6.5 cm, perfect for stationary monitoring applications.
Carry-on Design
Portable 10 × 6 × 3.5 cm³, ideal for mobile monitoring and personal exposure studies.
Operation and Data Transfer
The AETHON AQM features easy and simple setup procedures, long-term stability, durability, and precision.
It is powered with a USB type-C plug and features low power consumption.
It is easily configured via Bluetooth to be connected to a WiFi to upload data seamlessly and continuously to the AETHON Dashboard storage with 1-minute time resolution.
AETHON Dashboard – Visualization
The uploaded data on the cloud is dynamically converted on the AETHON Dashboard, which summarizes and visualizes the exposure levels and particle number size distributions.
The exposure levels summary is presented in several timescales:
instantaneous,
past 60 minutes,
past 24 hours,
past seven days,
past month,
and overall period as simple statistical tables listing average, standard deviation, minimum, median, and maximum for all monitored parameters.
The detailed exposure levels are visualized in plots illustrating the minute-to-minute variation during the different time scales.
The exposure data is instantly converted to Air Quality Index (AQi) based-on the local guidelines.
The exposure data can be conveniently downloaded from the AETHON Dashboard and stored locally in a common data format table.
The AETHON Dashboard for the AETHON AQM monitor ensures minute-to-minute updates for:
1. Exposure levels based on Particulate Matter (PM) mass metrics
2. Exposure levels based on selected gaseous concentrations metrics
3. Air quality index based-on the local guidelines
4. Ambient conditions for temperature and relative humidity
Accuracy and Precision
Based-on device-to-device (D2D) verification, particulate matter was calibrated by comparing the AETHON AQM models to reference instrument
(TSI DustTrak™ DRX 8533 with Ambient Mode operation). The AETHON AQM is accurate and precise to monitor the particulate matter concentrations
at normal indoor and outdoor conditions. It is also capable of monitoring severe indoor and outdoor conditions such as deteriorated air quality
caused by a vast range of indoor human activities (cooking, combustion for heating, smoking, etc.) or typical ambient pollution.
Devices were evaluated for tVOC and NOx using the calibration and test sequence according to the application note SGP40 – Testing Guide.
CO2 accuracy is interpreted as deviation to a high-precision reference with gas mixtures having a ±2% tolerance and is achieved after either
forced CO2 recalibration or initial operation for 2 days including exposure to fresh air.
Technical Specifications
| Dimensions | |
|---|---|
| Desktop design | Cube side length 6.5 cm |
| Carry on design | 10 × 6 × 3.5 cm³ |
| Weight | less than 100 grams |
| The user-customized design can be 3D-printed and crafted. | |
| Sampling and Data | |
|---|---|
| Sampling interval | 1 s (real-time) |
| Data logging interval | 1 minute average upload |
| Self-cleaning | Ensures accurate sampling |
| Data uploaded to AETHON Dashboard | |
| Mass Concentration Specifications | |
|---|---|
| Concentration range | 0 – 1000 µg/m³ |
| Particulate matter diameter ranges |
PM1 (0.3 – 1.0 µm) PM2.5 (0.3 – 2.5 µm) PM4 (0.3 – 4.0 µm) PM10 (0.3 – 10.0 µm) |
| Precision for PM1 and PM2.5 |
±5% m.v. (less than 100 µg/m³) ±10% m.v. (100 – 1000 µg/m³) |
| Precision for PM4 and PM10 |
±5% m.v. (less than 100 µg/m³) ±25% m.v. (100 – 1000 µg/m³) |
| Maximum long-term concentrations precision limit drift | ±1.25% m.v./year |
| Gas Sensing Specifications | |
|---|---|
| Total Volatile Organic Compounds (tVOC) | The tVOC is interpreted as an index 1 – 500 points with device-to-device variation is less than ±15 and repeatability is less than ±5 |
| Nitrogen Oxides (NOx) |
The NOx is interpreted as an index 1 – 500 points with device-to-device variation is less than ±50 and repeatability is less than ±10 |
| Carbon Dioxide (CO2) | This applies only to AQMx6 model, the CO2 range 0 – 40,000 ppm with accuracy ±(50 + 2.5% m.v.) ppm for 400 – 1000 ppm; ±(50 + 3% m.v.) ppm for 1000 – 2000 ppm; and ±(40 + 5% m.v.) ppm for 2000 – 5000 ppm |
| Formaldehydes (CH2O) | This applies only to AQMx8 model, the CH2O range 0 – 1000 ppb with accuracy ±20 ppb (or ±2.5% m.v.) for 0 – 200 ppb in clean air. Accuracy is affected in a mixture with VOC in the air. |
| Temperature and Relative Humidity Specifications | |
|---|---|
| Temperature (T) | Temperature accuracy ±0.45 C (@15 – 30 °C and 50% RH) and repeatability ±0.1 C (@25 °C and 50% RH) |
| Relative Humidity (RH) |
Relative humidity accuracy ±4.5% (@25 °C and 30% – 70% RH) and repeatability ±1 C (@25 °C and 50% RH) |
| Operation Conditions | |
|---|---|
| Acoustic emission level | max 25 dB(A) @ 20 cm with drift +0.5 dB(A)/year |
| Recommended operation conditions |
Temperature: 10 – 40 °C Relative Humidity: 20% - 80% RH |
| Performance outside recommended range may cause temporary reduction in performance (reversible RH drift, reduced RH, T, gas, PM accuracy) | |
| Absolute operation conditions |
Temperature: -10 – 50 °C Relative Humidity: 0% - 90% RH (non-condensing) |
| Operation outside absolute conditions may lead to permanently reduced sensor performance (gas sensitivity drift) or cause permanent damage to the device |
