Optical gas sensor
AssigneeDräger Safety AG & Co. KGaA
InventorsChristoph Clausen, Wilfried Diekmann, Günter Wahlbrink
Life of this patent
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Abstract
An optical gas sensor has a compact design and without movable optical elements, with at least one radiation source (8), at least one measuring detector (9, 12) and a reference detector (11). The reflecting measuring cuvette is designed as an annular space (1) between a first, inner cylinder section (6) and a second, outer cylinder section (2) that is concentric thereto. The annular space (1) is limited by a cover element (5) and a bottom element (7) arranged at a spaced location therefrom in the direction of the longitudinal axis. The cover element (5) is permeable to the measuring gas. The bottom element (7) accommodates the radiation source (8).
Claims13
An optical gas sensor, comprising:
- a first inner cylinder section;
- a second outer cylinder section, said first inner cylinder section being substantially concentric to said second outer cylinder;
- a cover element permeable to the measuring gas;
- a bottom element arranged at a spaced location from said cover element in the direction of a longitudinal axis of said first inner cylinder section and said second outer cylinder section with said first inner cylinder section, said second outer cylinder section, said cover element and said bottom element having reflective surfaces and forming an annular space of a reflecting gas cuvette;
- at least one radiation source, said bottom element accommodating said radiation source;
- a reference detector in said annular space;
- and
- a measuring detector in said annular space.
A method for gas sensing, comprising:
- providing a first inner cylinder section;
- providing a second outer cylinder section;
- providing a cover element permeable to the measuring gas;
- providing a bottom element;
- arranging the first inner cylinder section concentrically or substantially concentrically to the second outer cylinder with the bottom element spaced from the cover element in the direction of a longitudinal axis of the first inner cylinder section and the second outer cylinder section with the first inner cylinder section, second outer cylinder section, the cover element and the bottom element having reflective surfaces and forming an annular space of a reflecting gas cuvette;
- providing at least one radiation source accommodated in the annular space;
- providing a reference detector in the annular space;
- providing a measuring detector in the annular space;
- and
- sensing gas by directing radiation from the radiation source through the annular space using the reflective surfaces to the measuring detector and reference detector.
An optical gas sensor with a compact design and without movable optical elements, the optical gas sensor being formed by the steps comprising:
- providing at least one radiation source, at least one measuring detector and a reference detector;
- providing a reflecting measuring cuvette with an annular space between a first inner cylinder section and a second, outer cylinder section that is concentric thereto;
- limiting the annular space by a cover element and a bottom element arranged at a spaced location therefrom in the direction of a longitudinal axis of the cylinders;
- making the cover element permeable to the measuring gas;
- and
- accommodating the radiation source in the bottom element.
Dependencies are inferred from the claim text.