Set-up of Bosch Climo
At the end of May, IISc purchased the Bosch Climate Monitoring System (Climo) and, after extensive testing at the Centre for Nano Science and Engineering (CeNSE), it was set-up at the Maramma Circle Gate of IISc.
The system will be used as reference for the sensors developed by the team in CeNSE and for collecting preliminary data on air quality in Bangalore. The focus is right now on Particulate Matter (PM), the major source of air pollution. The indicators for the air quality index are PM2.5 and PM10, i.e. particulates with a diameter of less than 10 (e.g. dust and pollen) and 2.5 (e.g. combustion particles and organic compounds) microns in diameter. One micron is one thousandth of a millimetre, and – for comparison – a human hair has a diameter of 50 to 70 microns.
The concentration of PM2.5 and PM10 measured by Climo between 1 and 10 June is shown in the graph above. We are currently investigating whether those measurements are accurate. The spikes on the first three days might be connected to heavy winds and rainstorms.