公开(公告)号：US5672874A

公开(公告)日：1997-09-30

申请号：US413633

申请日：1995-03-30

申请人： Hiroshi Fujii ,  Ryosuke Fukushima ,  Tatsuhide Tsutsui ,  Masahiko Ishida ,  Shuzi Takada

发明人： Hiroshi Fujii ,  Ryosuke Fukushima ,  Tatsuhide Tsutsui ,  Masahiko Ishida ,  Shuzi Takada

IPC分类号： G01N33/26 ,  G01N21/35 ,  G01N21/3577 ,  G01N21/59 ,  G01N33/18 ,  G01N33/28

CPC分类号： G01N33/1833 ,  G01N21/3577

摘要： An oil concentration meter includes a sample cell for receiving an oil sample that can be irradiated with infrared rays from a light source. A first interference filter having a design wavelength of 3.4 .mu.m is positioned before a measuring detector, while a second interference filter transmitting a band range between 1 .mu.m and 5 .mu.m is positioned in front of a reference detector. A logarithm of the ratio of the reference detector output to the measuring detector output is used for determining the oil concentration in a sample.

摘要翻译： 油浓度计包括用于接收可以照射来自光源的红外线的油样的样品池。 设计波长为3.4μm的第一干涉滤光器位于测量检测器之前，而传输1μm和5μm之间的波段范围的第二干涉滤光器位于参考检测器的前面。 使用参考检测器输出与测量检测器输出的比率的对数来确定样品中的油浓度。