Inzwa ye-CO2 yamukela ubuchwepheshe bokutholwa kwe-NDIR infrared CO2, ububanzi bokulinganisa yi-400-2000ppm.Okokutholwa kwekhwalithi yomoya yasendlini yesistimu yokukhipha umoya, ifanele izindlu eziningi zokuhlala, izikole, izindawo zokudlela nezibhedlela, njll.