| 摘要 |
A confined gas stream coupled hazardous gas detector enclosure includes a housing and a cover such that the housing and cover together define a housing volume adapted to enclose the detector. An aperture is present in either the housing or cover, and a port test valve is seated within the aperture. A nozzle matable to the port test valve is used to deliver a hazardous gas test mixture to the housing volume to elicit an active alarm signal from the detector without opening the cover.
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