Calibration device and expiration detector

The embodiment discloses a calibration device and expiration detector, the calibration device comprises a gas collection piece, a gas storage chamber, a power piece, a first filter piece and an inspiration filter assembly, a gas inlet of the gas storage chamber is connected with a gas outlet of the gas collection piece through a gas inlet pipeline, and a gas inlet end of the power piece is connected with a gas outlet of the gas storage chamber; the gas pump is used for pumping out gas in the gas storage chamber or introducing gas into the gas storage chamber; the first filtering part is connected with the gas outlet end of the power part through a gas outlet pipeline and is used for filtering pumped or introduced gas; the air suction filtering assembly is communicated with the air inlet pipeline. According to the technical scheme of the embodiment, the power part is used for enabling external gas with nitric oxide filtered out through the first filtering part to sequentially flow to the gas storage chamber, t