Patent ID: 7294839
Filing Date: 2007-11-13
Classification: G01N

Abstract:
1. A sidestream sample cell comprising: a sample cell body having a cell body width, a cell body length, a longitudinal axis defined along the length of the sample cell body, a first port defined in a first end of the sample cell body, a second port defined in a second end of the sample cell body, and a first passage defined in the sample cell body generally between the first port and the second port, wherein the first port and the second port are coaxially aligned with the longitudinal axis of the sample cell body; a sample cell core having a cell core width, a cell core length, and a second passage defined in the sample cell core such that the second passage has a generally “Z-shaped” configuration through the sample cell core, wherein a central leg of the second passage is defined through the sample cell core in a direction corresponding to the cell core width and generally perpendicular to the longitudinal axis of the sample cell body, wherein the first passage is in fluid communication with the second passage, and wherein the sample cell core includes at least one first optical aperture defined therein to allow light to pass through the central leg of the second passage; and a first window disposed over the first optical aperture, and wherein the cell core width in combination with a thickness of the first window is not less than the cell body width so that the cell core width in combination with the thickness of the first window defines a maximum width of the sample cell over a length of the sample cell body that inserts into a sidestream gas monitoring system.