Particle measurement process and apparatus

Details Particle measurement process and apparatus Particle measurement process and apparatus

G - Physics

01

N

G01N 15/06 (2006.01) G01N 27/62 (2006.01)

Patent

CA 2716962

A process for measuring particle concentrations in a gas using an ejector (11 ) for producing an essentially constant sample flow (14) and for efficient mixing of the particle-containing sample and an essentially clean, ionized gas (13). The invention also relates to an apparatus implementing such process. The process and the apparatus can be utilized for example in measuring particle concentrations in an exhaust system of a combustion engine.

L'invention porte sur un procédé destiné à mesurer des concentrations de particules dans un gaz à l'aide d'un éjecteur (11), pour produire un écoulement (14) d'échantillon sensiblement constant et pour mélanger de manière efficace l'échantillon contenant des particules et un gaz ionisé (13) sensiblement propre. L'invention porte également sur un appareil pour la mise en uvre de ce procédé. Le procédé et l'appareil peuvent être utilisés, par exemple, pour mesurer des concentrations de particules dans un système d'échappement d'un moteur à combustion.

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