| 摘要 |
<p>A detector (1) having a sensor (15), an aspiration system (10), and a power source, whereby the aspiration system (10) includes two or more aspirators (16a, 16b). A method of operating the detector (1) is also disclosed, as is a trap (70) for absorbing output from a laser (66) used to detect particulate matter passing through the detector (1), wherein the trap (70) includes an absorption plate orientated substantially at a Brewster angle to the light (72) from the laser (66).</p> |
