| abstract |
A kind of mask for being configured to be attached to subject's face, including：Wall portion limits an inner space and covers the nose of the subject and at least part of mouth；Exhaled gas introduction part is arranged in the inner space and imports the exhaled gas of the subject；And ventilating part, a venting channels are limited, the exhaled gas of the subject imported from the exhaled gas introduction part is directed to by the venting channels in exhaled gas concentration detection sensor.Position of the exhaled gas introduction part in the inner space is variable. |