What is the operating principle of Airly sensors?  

Airly sensors use a laser method, which is also used at the National Environmental Monitoring stations. Then the sensors send the collected data to our server and are presented in an intuitive format for our recipient on our platform. 

What is the measurement error?  

The measurement range for PM2.5 dust specified by the manufacturer is 0-500 μg/m³. The accuracy of measurement given by the manufacturer is ± 10%@100-500 μg/m³ and ± 10 μg/m³@0-100 μg/m³. 

Why install Airly sensors when national measuring stations are available? 

Our goal is to build a network. A dense network of sensors allows to reduce the error of the measured value and allows correction by the network of data from the damaged sensor. It also allows to provide data about the air condition, not point-wise, in one place, but throughout the whole city. As a result, local sources of pollution can be identified immediately and data from places that have not been measured so far (single-family housing, low-emission areas, remote from precise but expensive measurement stations) are available, which is critical for the air quality forecast. Important in the Airly project is the fact that the low price of the devices allows building a dense network of sensors. The price of a large measuring station used, among others by the Chief Inspectorate for Environmental Protection is about PLN 250,000. This means that as part of the installation of one measurement station Airly can install about 250 devices. 

 How does the device react to moisture? Does not condensation cause that the results are less accurate?  

During the comparative analysis with the national station, the influence of temperature, humidity, pressure and condensation on the measurement results was unnoticeable. 

Why do your sensors have higher / lower readings than the national measuring stations?  

The concentrations of particulate matter can vary radically even over several meters, which is why the sensor network is so important, not the individual stations. Thanks to the network, we can detect a specific source. Our devices were calibrated for 12 months with the WIOŚ station. Differences may also arise from the fact that Airly sensors update the data on the map every few minutes, and the results from state stations can be shown even from a few hours ago. 

Why is one sensor showing such a high concentration of particulate matter compared to other sensors? 

Sensors as well as measuring stations collect data from the immediate vicinity. This means that over a dozen or so meters these readings can be different. It is enough to change measurements that in the area built up by single-family houses, residents of one of the houses smoke rubbish. Then on the map, you can see the burgundy colour of one of our sensors, which is closest to this source of pollution.  

Is air pollution forecast available?  

Yes, the air quality forecast for the next 24 hours can be checked on map.airly.eu and in the Airly app available for Android and iOS. 

 What parameters the sensor measures?  

Airly air quality sensor measures PM1, PM2.5, PM10 particulate mattertemperatureair pressure and humidity in real-time and we are working on expanding NO2, O3, SO2 and CO gases that can be already seen in some places on our map. 

Can I get historical data?  

Historical data is available only to research units for research purposes and is received by our clients. 

How to use the search engine on the map? 

To search for your location, click on the magnifying glass in the upper right corner. In the empty field, enter the full name of the town you are looking for, and then select it from the proposed hints. The platform will automatically show the selected location. 

Why are so many sensors grey? 

Not every grey sensor on the map indicates a malfunction. Most often it simply has been disconnected from the electricity or needs to be restartedEach of them we try to restore as soon as possibleIf you would like to help usnotify the sensor’s sponsor about the problem. 

What are circles and squares on the map?  

On our map, you can see two characteristic symbols, circles and squares. Circles mark Airly sensors and squares all state stations from which we only import data.