Radon is a radioactive gas originating from the ground which can permeate enclosed spaces and pose serious health risks for humans when inhaled chronically. At the Technical College of Applied Sciences in Zrenjanin continuous measurements of radon concentration were undertaken during the summer and autumn of 2023. Radon concentrations were monitored in four rooms located in the basement and ground floor levels, covering an area of approximately 4000 m², where previous short-term tests had indicated the highest radon concentrations. Detectors were positioned approximately 1 meter above the ground and away from doors, windows, walls and heating sources. These rooms remained in normal use throughout the measurement period. Two types of detectors were utilised simultaneously, placed in close proximity to each other. Radon concentrations were assessed using active-type radon detectors branded as Airthings, alongside CR39 track detectors. The radon concentration values obtained with CR39 detectors demonstrated good agreement with the results obtained using Airthings detectors. The statistical Z-test was employed for analysis.

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