| 摘要 |
<p>A gas detection device (100) is provided comprising an exterior housing (110) in which an active pelement (120) and compensating pelement (130) are disposed. The gas detection device further comprises a porous frit (220) used as a flow limiter that is seated within a distal end of the exterior housing to separate the active pelement and compensating pelement from the surrounding environment. Such porous frit (220) is adapted to prevent flashback into the surrounding environment while allowing movement of environmental gas through the porous frit to contact the active pelement (120) and compensating pelement (130). The gas detection device further comprises a flow guide or manifold (300) for directing flow of environmental gas into the flow director (180) and internal housing (160), which flow guide (300) comprises an outlet port (330), and inlet port (320) through which a forced flow of environmental gas is pumped to pass through the porous frit and into the exterior housing (110) in a direction parallel to the device axis.</p> |
