公开(公告)号：US6148659A

公开(公告)日：2000-11-21

申请号：US168819

申请日：1998-10-08

申请人： John E. Traina

发明人： John E. Traina

IPC分类号： G01N33/00 ,  G01N31/06 ,  G01N7/00 ,  G01N25/56

CPC分类号： G01N33/0016 ,  G01N33/0011

摘要： A gas concentration monitor has a pneumatic bridge having two parallel flowpaths containing a first conduit leg and a second conduit leg connected to an input line. Each leg has an entry orifice and an exit orifice through which a portion of the gas sample flows. Orifices need not be of equal size and or kept at the same temperature. A pump is connected to both legs for drawing the sample through the bridge. A condenser or absorber which removes the gas whose concentration is being determined is connected to the first leg between the entry orifice and the exit orifice. A differential pressure gauge measures the differential pressure between the first leg and the second leg which differential pressure changes due to removal of the target gas of measurement interest from the other gas fraction passing through the bridge towards discharge from the bridge. From that measurement one can calculate the concentration in the sample of the gas that was removed by the condenser or absorber.

摘要翻译： 气体浓度监测器具有气动桥，其具有两个平行的流路，其包含连接到输入线的第一管道腿和第二管道腿。 每个支腿具有入口孔和出口孔，气体样品的一部分通过该出口孔流动。 孔不需要相同的尺寸或保持在相同的温度。 泵连接到两条腿，用于通过桥将样品拉出。 去除其浓度被确定的气体的冷凝器或吸收器连接到入口孔口和出口孔口之间的第一腿部。 差压表测量第一腿部和第二腿部之间的压力差，由于通过桥梁的其他气体部分去除了从桥梁排出的测量值的目标气体而使压差发生变化。 从该测量可以计算通过冷凝器或吸收器去除的气体样品中的浓度。

公开(公告)号：US4937461A

公开(公告)日：1990-06-26

申请号：US234428

申请日：1988-08-22

申请人： John E. Traina

发明人： John E. Traina

IPC分类号： G01N21/53

CPC分类号： G01N21/534

摘要： An improved transmissometer and optical assembly therefor contains a solid state light source preferably a light emitting diode. The ligh source emits a low level light beam that is split, part of which is passed through a gaseous sample then directed to a detector while the otehr part is directed to a second detector. Electronic components are provided to use signals from the detectors to control the light source and determine opacity of the sample.

摘要翻译： 改进的透射计及其光学组件包括固态光源，优选为发光二极管。 灯源发射分裂的低电平光束，其中一部分光束通过气态样品，然后被引导到检测器，而奥特尔部分被引导到第二检测器。 提供电子部件以使用来自检测器的信号来控制光源并确定样品的不透明度。

公开(公告)号：US5077480A

公开(公告)日：1991-12-31

申请号：US524845

申请日：1990-05-18

申请人： John E. Traina

发明人： John E. Traina

IPC分类号： G01N21/53 ,  G01N15/06 ,  G01N21/49 ,  G01N21/85

CPC分类号： G01N21/534

摘要： An improved transmissometer of the type which has a visible light source and is responsive to peak and mean spectral responses between 500 nm and 600 nm and optical assembly therefor contains a solid state light source preferably a light emitting diode. The light source emits a low level light beam that is split, part of which is passed through a gaseous sample then directed to a detector while the other part is directed to a second detector. Electronic components are provided to amplify the signal that has passed through the sample providing high gain, low noise amplification and use signals from the detectors to control the light source and determine opacity of the sample.

摘要翻译： 具有可见光源并响应500nm至600nm之间的峰值和平均光谱响应的类型的改进的透射计及其光学组件包含固态光源，优选为发光二极管。 光源发射分裂的低级光束，其一部分通过气态样品，然后被引导到检测器，而另一部分被引导到第二检测器。 提供电子元件以放大已经通过样品的信号，从而提供来自检测器的高增益，低噪声放大和使用信号以控制光源并确定样品的不透明度。