FAQs

The map shows a number and location of the currently installed Klimerko air quality monitoring devices on the territory of Belgrade, Smederevo and Novi Sad. Since it presents the initiative of citizens, the number of devices is growing with each new citizen entering into an agreement for a device, which consequently brings about more locations on the map and more places shown on the territory of Serbia.

Klimerko sensors measure external air quality.

Klimerko devices measure: a) air humidity; b) air temperature; c) concentration of PM1, PM2.5 and PM10 particular matter in micrograms per one metric cube of air.

PM (particular matter) or suspended particles are microscopic particles of liquid or solid matter suspended in the polluted air. The ones especially dangerous are those that can penetrate deep into the lungs, such as PM2.5 and PM10 particles. The number next to the mark PM presents the diameter of the particle, meaning that these particles are smaller than 1/7 of average width of a human hair.

Most of them are generated during various combustion processes and from exhaust fumes generated during those processes (thermo plants, foundries, diesel fuel, steelworks, waste incineration installations…).

Each PM particulate has a diameter of less than 10 micrometer and is dangerous for human health due to the fact that it easily penetrates into the lungs and stick to the alveoli. The criterion above which the quantity of PM particles becomes a risk to human health according to the World Health Organization is 50 micrograms per 1m3 of air.

Yes, Klimerko devices show the current levels of pollution on the location where it is installed. The software has been designed so that the device can measure and show new value every 15 minutes.

Two or more devices that are physically located nearby, may be grouped together– so the map shows the average value and colours  of one or more cluster of devices. By default, the numbers in the circles on the map show the levels of PM10 concentration per cubic meter in that location. If you click on the cluster and zoom in, you can also read values from individual devices, and additional values PM 2.5, PM1, temperature, pressure and humidity, as well as on the left menu as well. You can also change the date and go back in time.

PM information regarding the level of air pollution may be seen by zooming in a map and clicking on each individual Klimerko device.

An assembled Klimerko device is a size of an average coffee mug. It should be installed on an external location, for example on a balcony, or outside window wall before initiating the process of measuring air quality. Within 15 minutes, the results shall be available on the user account, but also on the Vazduh Gradjanima Android Application and this website.

Klimerko device has not been calibrated since it was established that PMS7003 sensors are precise enough for civil measurement. This has been confirmed with the installation of 4 PMS7003 sensor on a vehicle of the Institute of Public Health “Dr. Milan Jovanović Batut” and comparing the data with their professional sensors, as well as by comparing official values provided by the Environmental Agency with the values on a Klimerko device in its vicinity. One of the problems with these sensors (when compared with professional sensors of the Institute “Batut”) is that the waves of polluted air may affect the reading of data. This problem has been solved in Klimerko Firmware 1.3.0 (https://github.com/DesconBelgrade/Klimerko/releases/tag/1.3.0) in the way that 10 readings are done before sending the data, and the data to be sent on the platform shall be the mean value of those 10 readings. Also, PMS7003 sensors have very few deviations in reading in between.

This device was developed on Belgrade Hackaton desc0n 2018 and since then, it has been continuously improved in terms of its hardware and software and maintained by the technical community, Internet Society Serbia, Haklab Belgrade and Descon team.