Adaptable directly on the Ventilation sensor ref. 482 109 or on the tube of the human respiration chambers ref. 453144 and 453143, this filter ensures a double protection : - For the experimenter: used in single use, it provides 99.9% bacterial and 99.7% viral protection. In addition, it represents an absolute barrier against any ingestion of foreign bodies. - For the equipment: it prolongs the life of your equipment by avoiding disinfection with Dakin.