| 摘要 |
<p>There is provided a gas analyzer, including a radiation source (2), an analytical space (6) through which passes the gas to be analyzed, at least one detector (14) for detecting the intensity of radiation passing through the space, means (18,20,22,24) facilitating the alternating introduction, into the space (6), of the gas to be analyzed and a reference gas (RG) having a concentration located at least in the upper half of the range of concentrations to be measured by the gas analyzer. The analyzer further includes processing means (32), having memory means, to process signals originating in the detector (14), the memory means adapted to store in a first mode of operation signals representing instantaneous intensity values of the detected source and, in a second mode of operation, to store signals representing intensity values obtained when the analytical space (6) is filled with the reference gas, circuit means for comparing the instantaeous values with the reference value, and indicator means (38) for indicating concentration. A method for analyzing gases to establish their concentration is also provided.</p> |
