公开(公告)号：US4370553A

公开(公告)日：1983-01-25

申请号：US165250

申请日：1980-07-02

Applicant: Roy A. Waycaster ,  William T. Baker ,  Jerry D. Bidle

Inventor： Roy A. Waycaster ,  William T. Baker ,  Jerry D. Bidle

IPC: G01N21/03 ,  G01N21/35 ,  G01J1/04

CPC classification number: G01N21/3504 ,  G01N21/03 ,  G01N2201/1215

Abstract: A gas analyzer for performing gas analysis on a sample gas containing contaminants which normally interfere with the operation of the analyzer is disclosed comprising a source of radiant energy; means for directing radiant energy through a sample gas; a disposable gas cell; a detector for receiving radiant energy; and a circuit for analyzing the output of the detector and indicating the concentration of predetermined constituents in the sample gas. The gas cell comprises a disposable sample gas cell having a sample enclosure for containing a sample gas volume; sample windows defining a portion of a sample gas optical path extending from the source of radiant energy through the sample gas volume to the detector; an inlet for supplying sample gas to the sample gas volume and an outlet for exhausting sample gas from the sample gas volume. The disposable sample cell is provided with inlet and exhaust manifolds having cross-sectional areas that minimize dead space and insure laminar flow, minimizing stagnant areas. Specifically, the cross-sectional areas of the inlet and outlet manifolds are relatively constant, the cross-sectional area of the outlet being larger than the cross-sectional area of the inlet, and the inlet and outlet manifolds vary in cross-sectional shape from elongate shapes proximate the windows to a shape having roughly equilateral dimensions distal to the windows. The analyzer and the gas cell are provided with a number of inter-related features that make the analyzer self aligning and eliminates the necessity of recalibrating the analyzer each time a sample cell is replaced.

Abstract translation: 公开了一种用于对通常干扰分析仪的操作的污染物的样品气体进行气体分析的气体分析仪，其包括辐射能源; 用于通过样品气体引导辐射能的装置; 一次性气室; 用于接收辐射能的检测器; 以及用于分析检测器的输出并指示样品气体中预定成分的浓度的电路。 气室包括具有用于容纳样品气体体积的样品外壳的一次性样品气室; 样本窗口，其限定从辐射源通过样本气体体积延伸到检测器的样品气体光路的一部分; 用于将样品气体供应到样品气体体积的入口和用于从样品气体体积排出样品气体的出口。 一次性样品池设有入口和排气歧管，其具有使死区最小化并确保层流的横截面积，从而最小化停滞区域。 具体来说，入口歧管和出口歧管的横截面面积相对恒定，出口的横截面面积大于入口的横截面面积，而入口和出口歧管的横截面积从 靠近窗户的细长形状具有远离窗户的大致等边尺寸的形状。 分析仪和气室配备有多个相互关联的特征，使分析仪自动对准，并且每次更换样品池时都不需要重新校准分析仪。