| 摘要 |
<p>A diffusion-type NDIR gas analyzer (100) with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide (2) and gas located within a diffusion pocket of space (8) created between the waveguide and a semi-permeable membrane (7) which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source (1) that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a pore size less than approximately 50 micrometers and be comprised of ultrahigh molecular weight polyethylene or other suitable materials.</p> |
