Apparatus for analyzing a gas.

摘要

A gas analyzer capable of measuring select properties of gas includes a source 12 for emitting a beam 14 of radiation and a detector 16 for receiving the radiation, with the beam 14 aligned to impinge the detector 16. A housing 22 for enclosing the beam 14 has two apertures 26,28 permitting the gas to enter the housing 22 through one of the apertures 26 to intercept the beam 14, and to exit from the housing 22 through the other aperture 28. Nozzles 38, 39 capable of generating fluid curtains are positioned to intercept the beam 14 and are positioned to define a zone 70 in the housing 22 within which zone 70 the gas is confined.