On December 04-15, 2020 home validation tests carried in IKO Science laboratory, showing significant ability of Biodetector BD500 to detect bioaerosols. Tests resulted in detection of Bovine serum albumin (molecular weight 66kDa, hydrodynamic diameter 6 nanometres) and α-Lactalbumin from bovine milk (molecular weight 14.2kDa, hydrodynamic diameter 2-4 nanometres). Tests witnessed by Mr. Toomas Kübarsepp, Senior Researcher, Research and Development Division of METROSERT AS.