The GAIA Air Quality Monitoring Stations are specially optimized, highly accurate, and easy-to-use monitoring stations designed by the Earth Sensing labs. The stations are suitable for affordable an budget - as low as 100 USD per year for the most recommended A12 station.
| Sensors | Particle Matter (PM) Sensor | PM2.5, PM10 and PM1.0 |
| Redundant PM Sensors | Yes (x3) | |
| Weather Sensor | Temperature and Humidity | |
| Visual Indicators | RGB LED | yes |
| Connectivity | WIFI | yes (2.4G) |
| External Antenna | yes, 3dB | |
| Power Suppply | Power Supply | yes, using standard USB 5V DC |
| Power cable | 10 meters (33 feet) water proof cable | |
| Data Storage & Broadcast | Publication | yes, broadcasted on aqicn.org and waqi.info |
| Historical Data | yes, accessible via website or API | |
| SD-Card storage | optional, for extra 50USD | |
| Maintenance | Anomaly Detection | yes |
| Remote Maintenance | yes | |
| Pricing | Product Cost | One-time payment: 200USD or Yearly: 100USD + deposit: 50USD |
The GAIA A18 is an improved GAIA A12 design, with solar panel power and long-distance radio, allowing the station to operate in areas where either power supply or WiFi connectivity is unavailable.
The GAIA A18 can operate using the battery for seven days without a recharge. The solar panel battery can recharge the battery within a few hours under direct sun conditions. Using both the solar panel and the battery, it is possible to operate the station forever off-grid, provided you have at least one sunny day every week.
The GAIA A18 can operate using WIFI like the GAIA A12. But it also comes with "long-range" connectivity support (LoRA), allowing you to locate your station several hundreds of meters up to several kilometres from your network gateway (depending on the line of sight). The GAIA A18 comes with an external WIFI/LoRA gateway.
The GAIA A18 also contains an internal GPS sensor to make it easier to locate your remote stations.
The GAIA A18 with both solar panel+battery and LoRa features connectivity costs .
It is also possible to get the A18 with only one feature (either Solar or LoRa) for :
| Product version | GAIA A18 Solar+LoRa | GAIA A18 Solar | GAIA A18 LoRa | GAIA A12 |
| Network Connectivity | LoRa + WiFi | WiFi | LoRa + WiFi | WiFi |
| Power Supply | Battery + Solar Panel | Battery + Solar Panel | Power Outlet | Power Outlet |
| Accessories | Solar Panel 5m power cable LoRa gateway | Solar Panel 5m power cable | 10m power cable LoRa gateway | 10m power cable |
| Cost |
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Frequently Asked Questions:
Mounting with strips 
| (vehicles per day) | |
|---|---|
| ≤1,000 | 10 |
| 10,000 | 10 |
| 15,000 | 20 |
| 20,000 | 30 |
| 40,000 | 50 |
| 70,000 | 100 |
| ≥110,000 | 250 |
For official stations, there are two more requirements, with the intent is to locate the station on sites representative of the ambient air quality levels (reference).
There are so many air quality related products on the market; Some are good, other are bad. For consumers like us, it can sometime be difficult to find out which product is good and worth buying and which one is bad and should not be bought. For this reason, we have created this 'Air Quality Products' page on which you will find a selection of products that we have carefully studied and evaluated.
| 空气质量指数 | 空气质量指数级别（状况）及表示颜色 | 对健康影响情况 | 建议采取的措施 |
| 0 - 50 | 一级（优） | 空气质量令人满意，基本无空气污染 | 各类人群可正常活动 |
| 51 -100 | 二级（良） | 空气质量可接受，但某些污染物可能对极少数异常敏感人群健康有较弱影响 | 极少数异常敏感人群应减少户外活动 |
| 101-150 | 三级（轻度污染） | 易感人群症状有轻度加剧，健康人群出现刺激症状 | 儿童、老年人及心脏病、呼吸系统疾病患者应减少长时间、高强度的户外锻炼 |
| 151-200 | 四级（中度污染） | 进一步加剧易感人群症状，可能对健康人群心脏、呼吸系统有影响 | 儿童、老年人及心脏病、呼吸系统疾病患者避免长时间、高强度的户外锻炼，一般人群适量减少户外运动 |
| 201-300 | 五级（重度污染） | 心脏病和肺病患者症状显著加剧，运动耐受力降低，健康人群普遍出现症状 | 儿童、老年人及心脏病、肺病患者应停留在室内，停止户外运动，一般人群减少户外运动 |
| 300+ | 六级（严重污染） | 健康人群运动耐受力降低，有明显强烈症状，提前出现某些疾病 | 儿童、老年人和病人应停留在室内，避免体力消耗，一般人群避免户外活动 |
| Celcius | |
