公开(公告)号：US3648162A

公开(公告)日：1972-03-07

申请号：US3648162D

申请日：1969-10-24

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  DODSON MICHAEL

IPC: G01L21/00 ,  G01N27/74 ,  G01R33/12

CPC classification number: G01N27/74 ,  G01L21/00

Abstract: Apparatus for determining the partial pressure of a paramagnetic gas in a gas mixture, comprising: an elongated C-shaped magnet for generating a plane of high-magnetic flux density over a relatively large rectangular area, and a region of low-flux density at short distances from such plane; and a test body in the shape of a rectangular parallelepiped having dimensions approximately equal to the size of the rectangular area and the distance between the plane of high-flux density and the region of low-flux density. Means are provided for pivotally mounting the test body with one surface thereof aligned with the rectangular area and an opposite surface aligned with the region of low-flux density, the test body being mounted for movement in a direction perpendicular to the plane of high-magnetic flux density.

Abstract translation: 用于确定气体混合物中的顺磁性气体的分压的装置，包括：用于在相对大的矩形区域上产生高磁通密度的平面的细长C形磁体和短的低通量密度区域 距飞机的距离; 以及具有大致等于矩形区域的尺寸和大磁通密度的平面与低磁通密度区域之间的距离的矩形平行六面体形状的测试体。 提供了用于枢转地安装测试体的装置，其一个表面与矩形区域对准，并且相对表面与低磁通密度区域对准，测试体被安装成沿垂直于高磁场平面的方向运动 通量密度。

公开(公告)号：US3562522A

公开(公告)日：1971-02-09

申请号：US3562522D

申请日：1968-09-18

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  DAVIS JAMES C ,  KEENAN CHARLES A ,  RANDALL JERROLD H

IPC: F02D41/14 ,  G01N21/35 ,  G01N21/26

CPC classification number: F02D41/1451 ,  G01N21/3504

Abstract: A nondispersive infrared analyzer having a source, flow cell, filter and detector is disclosed. The inlet to the flow cell may be switched from one of two intakes and the outlet is connected to a jet pump. With air flowing through the cell the zero suppression control is adjusted to reduce the signal input to the DC amplifier to zero. The calibration blade is started and the span control adjusted to provide a given up-scale reading of the meter. The analyzer is then calibrated to provide a reading directly in concentration of the desired constituent.

公开(公告)号：US3897153A

公开(公告)日：1975-07-29

申请号：US38200573

申请日：1973-07-23

Applicant: BECKMAN INSTRUMENTS INC

Inventor： KEENAN CHARLES A ,  CEDERSTRAND CARL N

IPC: G01J1/30 ,  G01N21/37 ,  G01N21/34 ,  G01N21/22

CPC classification number: G01J1/30 ,  G01N21/37

Abstract: Phase and amplitude balance adjustment are provided for a gas analyzer of the type in which two infrared beams are generated, one passed through a cell containing a standard and the other through a cell containing a sample gas, constituents in which are to be detected and measured; and there is a detector which compares the energy absorption in the two cells to provide a measure of the gas content. In this type of gas detector there is a chopper consisting of a rotating shutter with two sectors which rotate in front of two apertures through which infrared beams are transmitted from two different infrared beam generators. Phase adjustment is accomplished mechanically by physically moving a mounting plate carrying the two infrared beam generators with respect to the position of the apertures. Amplitude balance adjustment is accomplished by adjusting the relative electrical energy supplied to the two infrared beam generators.

Abstract translation: 提供相位和幅度平衡调整用于产生两个红外光束的类型的气体分析仪，一个通过含有标准的电池，另一个通过含有样品气体的电池，其中要检测和测量的组分 ; 并且存在一个检测器，其比较两个电池中的能量吸收以提供气体含量的量度。 在这种类型的气体检测器中，有一个由两个扇区旋转的快门组成的斩光器，两个扇区在两个孔的前面旋转，两个红外光束通过两个孔从两个不同的红外光束发生器传播。 通过相对于孔的位置物理地移动携带两个红外光束发生器的安装板来机械地实现相位调整。 振幅平衡调节是通过调节供应给两个红外光束发生器的相对电能实现的。

公开(公告)号：US3920993A

公开(公告)日：1975-11-18

申请号：US50698474

申请日：1974-09-18

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  KEEGAN JACK J

IPC: G01N21/35 ,  G01N21/26

CPC classification number: G01N21/3504

Abstract: An optical bench having a gas flow cell with an infrared source at one end and an infrared sensor at the other end is provided with an attachment or ''''piggyback'''' for determining the concentration of a second constituent or pollutant in a sample. The attachment comprises a sensor inserted into the gas cell adjacent to the end toward the infrared source so that a beam of radiant energy falls directly upon the inserted sensor. The invention is particularly well suited for determining the concentration of a pollutant which occurs in greater concentration or is more highly absorptive of radiant energy than that of the pollutant for which the optical bench was originally designed.

Abstract translation: 具有在一端具有红外源的气体流通池和另一端的红外线传感器的光学工作台具有用于确定样品中第二种成分或污染物的浓度的附件或“背负式”。 该附件包括一个传感器，该传感器插入到靠近红外线源端的气室中，使得一束辐射能直接落在插入的传感器上。 本发明特别适用于确定与最初设计光学台的污染物相比发生的浓度更高或更高的辐射能吸收的污染物的浓度。

公开(公告)号：US3911277A

公开(公告)日：1975-10-07

申请号：US49167274

申请日：1974-07-25

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  KEENAN CHARLES A

IPC: G01N21/35 ,  G01N21/34

CPC classification number: G01N21/3504

Abstract: A sensor unit is provided for selective detection of one or another of gaseous pollutants by response to absorption of infrared radiation by the pollutant to be detected. The unit contains a pair of thermistor elements mounted back to back in a housing having two opposite windows, in each of which filters are mounted. These filters are selective for the different radiation absorption characteristics of two different gaseous pollutants such as carbon monoxide and hydrocarbons. Each thermistor is behind a different filter. The unit is rotatable to expose one filter window or the other to radiation passing through the sample containing the pollutant to be measured. A shield is provided to shade the filter window which is not to be exposed to radiation.

Abstract translation: 提供传感器单元，用于通过响应待检测污染物的红外辐射的吸收来选择性地检测一种或另一种气态污染物。 该单元包含一对背对背安装的热敏电阻元件，该热敏电阻元件具有两个相对的窗口，每个过滤器都安装在其中。 这些过滤器对于两种不同的气体污染物如一氧化碳和碳氢化合物的不同辐射吸收特性是选择性的。 每个热敏电阻都位于不同的过滤器之后。 该单元可旋转以将一个过滤窗或另一个过滤窗暴露于通过含有要测量污染物的样品的辐射。 提供屏蔽以遮蔽不暴露于辐射的过滤器窗口。