Patent ID: 8505534

Claim:
A humidifying device for breathing gas, the humidifying device comprising: a housing with a recess; a water reservoir; a heater; an evaporating chamber with a water feed, a breathing gas feed channel, a breathing gas outlet channel, a float element positioned directly below said water feed and a filling level indicator, said float element comprising a float element surface, said evaporating chamber being introduced at least partially into said recess and in contact with said heater for heating water and receiving water from said water reservoir through said water feed, said float element being guided in a floatingly movable manner on the water and said float element closing the water feed above a water level set point in said evaporating chamber, said filling level indicator recognizing a drop of the water level from the water level set point as a function of a position of said float element, wherein breathing gas is delivered to a patient via at least said breathing gas outlet channel, said float element surface rising and falling with said water level, said float element surface being in direct contact with said water feed with said water level being above said water level set point.