Patents Assigned to Hartmann und Braun A.G.
  • Patent number: 5055688
    Abstract: Nondispersive infrared gas analyzer for the concurrent measurement in the concentration of several components contained in a gas sample, and including a source of and modulator for infrared radiation, a measuring and reference chamber are traversed by said beams, at least two serially pneumatic radiation detectors each having a front and a rear chamber filled with a respective component and each provided for measuring the pressure differential between the respective chambers, a filter disposed between the first detectors upstream and having opaque range which covers at least a major absorption band of the component filling the downstream detector but having a region of transparency which includes at least one secondary absorption band of that component.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: October 8, 1991
    Assignee: Hartmann und Braun A.G.
    Inventor: Walter Fabinski