Patent ID: 9068933
Filing Date: 2015-06-30
Classification: G01N

Abstract:
1. An apparatus for determining concentration of a substance in a fluid stream, the apparatus comprising: a laser light source coupled to a first end of a pitch optic cable, the laser light source being a swept-λ laser configured to produce light output over a sweep range that includes a region having a significant absorption feature of the substance and at least one region of substantially zero absorption; a lens disposed proximate a second end of the pitch optic cable for directing the light through a sampling chamber to a mirror; a catch optic cable having a second end disposed proximate said lens; a catch optic affixed to a first end of said catch optic cable, said catch optic including a detector, said detector providing an output signal representative of light intensity across said sweep range; and a processor coupled to said detector, said processor configured to determine said concentration as a function of said output signal.