Infrared optical gas-measuring device
AssigneeDräger Safety AG & Co. KGaA
InventorsHorst HÜTTMANN, Andreas Moldt
Life of this patent
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Abstract
A first, upper slotted disk (10) and a second, lower slotted disk (20) are arranged as a gas inlet (11) in a gas-measuring device (1). The first, upper slotted disk (10) and the second, lower slotted disk (20) are connected to one another and to a sensor housing (2) via a spacer element (29). The arrangement of the slotted disks (10, 20) in relation to one another is selected to be such that reduced propagation of light of an infrared radiation source (43) through both slotted disks (10, 20) into the measuring environment is achieved.
Claims20
An infrared optical gas-measuring device comprising:
- a gas inlet opening for a gas sample to be analyzed in an infrared optical gas sensor, the gas inlet opening comprising two slotted or perforated disks, each of said disks defining transparent and gas-permeable elements and nontransparent and gas-impermeable elements;
- an outer housing;
- and
- at least one infrared radiation source, the slotted or perforated disks being arranged one on top of another at a distance such that the transparent and gas-permeable elements of one of said two slotted disk or perforated disks are covered in a vertical axial direction by the nontransparent and gas-impermeable elements of another of said two slotted or perforated disks.
A method of infrared optical gas-measurement, the method comprising the steps of:
- providing a gas inlet opening for a gas sample to be analyzed, the gas inlet opening comprising two slotted or perforated disks, each of said disks defining transparent and gas-permeable elements and nontransparent and gas-impermeable elements;
- providing an outer housing;
- providing an infrared radiation source;
- arranging the slotted or perforated disks one on top of another at a distance such that the transparent and gas-permeable elements of one of the two slotted or perforated disks are covered in a vertical axial direction by the nontransparent and gas-impermeable elements of another of the two slotted or perforated disks to provide an infrared optical gas sensor;
- and
- analyzing the gas sample with the infrared optical gas sensor.
Dependencies are inferred from the claim text.