Detection apparatus for gases, incorporating a diffusion...

Details Detection apparatus for gases, incorporating a diffusion... Detection apparatus for gases, incorporating a diffusion...

G - Physics

01

N

73/104

G01N 33/00 (2006.01)

Patent

CA 1301479

ABSTRACT An apparatus to detect a gaseous component in air has a sample chamber that contains a sensor through which an air sample flows through a closable inlet and outlet. The sensor is hermetically sealed off from its surroundings, not only during flushing of the sample chamber, but primarily during the measurement process it- self, this being done so as to preclude any effects caused by the diffusion of ambient air into the measurement chamber. To this end, it is foreseen that in order to determine the sample quantity that is diffusing into the measurement chamber at the beginning of a specifiable time period both the inlet and the outlet are closed and at the same time the measurement chamber opening is opened, and in that after the expiration of the time period the measurement chamber opening is closed.

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