Below you can find graphs presenting the results of measurements at Lönnrotinkatu and other main streets (“Sensor measurements” tab). We monitor the concentrations of thoracic particles by sensors along main streets. You can examine the dust concentrations on main streets from different monitoring locations. The results are available as a graph or table. In the graphs, you can select one or more monitoring items that you want to view. The monitoring results are displayed hourly. You can select a day, week, or month as the reference period. The monitoring results are unverified hourly averages. Note! The results are raw data and errors have not been removed. Humidity can affect the results displayed on the sensor measurements tab which have been measured with AQT430 (Vaisala) sensors. If dust concentrations are high and air humidity is greater than 95%, the high concentrations are likely due to humidity. The measurements at Lönnrotinkatu are carried out with a more precise instrument (AQ Guard, Palas). Its results are fairly reliable and show no incorrect results caused by high humidity or mist.