For long-term inhalation of oxygen, a humidifier is needed that is why we have available reusable humidifiers as well as single-use humidifiers. The humidifier works by passing the gas into the water through a filter that produces bubbles that moisten the air. EQSens Humidifiers are refined to produce a great number of very small bubbles. Thus, they ensure a quieter and more efficient operation, as they produce more bubbles at the same flow rate than other humidifiers. The capacity of bottle of a reusable humidifier is large (300 ml). You can choose between two types of bottles, which differ according to the type of material and temperature resistance. Reusable humidifiers bottles are completely made of polysulfone and so they could be sterilized up to 134°C, reusable humidifiers bottles made of polycarbonate could be sterilized up to 121°C.