E+E Elektronik has been appointed by the Federal Austrian Office of Metrology and Surveying to maintain as designated laboratory (NMI) the national etalon for humidity and air flow speed in Austria. Besides, E+E Elektronik operates a government-accredited calibration laboratory according to EN ISO/IEC 17025. The calibrations are performed either in the accredited calibration laboratory or on site. The special calibrations for humidity and air flow measuring equipment in the designated NMI laboratory are of particular interest for accredited calibration centers.