Gas analysis apparatus and corresponding method

摘要

The qualitative and/or quantitative gas analyzer uses a gas sensor with a predetermined heating cycle. The device has at least one chamber, containing a socket mounted sensor element which is receptive to a specific gas component and an apertured cover. The cover is rotatable relative to the sensor chamber, or vice versa, so that the aperture can be aligned with the chamber in order to expose the sensor to the test atmosphere for a predetermined interval. An independent claim is also included for the use of the analyzer in which conductivity-time profiles are measured for a particular component and compared with calibration profiles for various concentrations and conditions. The preferred detector devices are semi-conductors which may be used in conjunction with gas permeable filter membranes to provide gas specificity. The cover may be rotated by a stepping motor drive.