Infrared gas detector
AssigneeSensor Electronics, Inc.
InventorPatrick G. Smith
Life of this patent
Estimating the term…
Abstract
A gas detector that includes at least one source of infrared radiation, at least two analytical detectors, each analytical detector adapted to provide an output signal indicative of a first gas of interest and positioned to receive radiation from the source of radiation, at least one reference detector adapted to receive radiation of a predetermined wavelength, a sample chamber for receiving a gaseous sample, and an optical path length disposed between the source of radiation and the analytical detectors and passing through the sample chamber.
Claims43
A gas detector comprising:
- at least one source of infrared radiation;
- at least two analytical detectors, each analytical detector adapted to provide an output signal indicative of a first gas of interest, said analytical detectors being positioned to receive radiation from said source of radiation, a first of said at least two analytical detectors being positioned to receive radiation of a first predetermined wavelength, and a second of said at least two analytical detectors being positioned to receive radiation of said first predetermined wavelength;
- at least one reference detector adapted to provide an output signal independent of the first gas of interest;
- a means for summing said output signals detected by said at least two analytical detectors;
- and
- a sample chamber for receiving a gaseous sample,
- an optical path from said source of infrared radiation to said analytical detectors passing through said sample chamber.
A gas detector for detecting a predetermined gas, the gas detector comprising:
- a source of infrared radiation;
- a plurality of infrared radiation detectors, at least two of said infrared radiation detectors being, adapted to detect radiation of a first wavelength and being adapted to provide an output signal corresponding to the presence of the gas of interest;
- and
- a means for summing said output signals generated by said analytical detectors.
The gas detector of clam 29, wherein a filter is interposed between the at least one source of infrared radiation and each additional analytical detector, the filter being adapted to transmit radiation of a second band of wavelengths said second band of wavelengths corresponding to radiation of a wavelength absorbed by the second gas of interest.
A method of detecting gas using a gas detector comprising
- a source of infrared radiation,
- at least two analytical detectors, each of said at least two analytical detectors being adapted to generate a signal indicative of a first gas of interest, a sample chamber, and
- an optical path passing through said sample chamber,
- the method comprising:
- transmitting infrared radiation from said source of infrared radiation through a gaseous sample present in the sample chamber of said gas detector;
- detecting infrared radiation of a first predetermined wavelength at a first of said at least two analytical detectors;
- detecting infrared radiation of said first predetermined wavelength at a second of said at least two analytical detectors;
- sending a signal from said analytical detectors to a processor;
- and summing the signals from said analytical detectors.
A method of analyzing a gaseous sample, the method comprising:
- passing the gaseous sample through the sample chamber of a gas detector comprising
- at least one source of infrared radiation,
- at least two analytical detectors, each analytical detector being adapted to provide an output signal indicative of a first gas of interest, said analytical detectors being positioned to receive radiation from said source of radiation, and
- a sample chamber;
- radiating the gaseous sample with radiation from said source of infrared radiation;
- detecting said radiation of a first predetermined wavelength at a first of said at least two analytical detectors;
- detecting said radiation of said first predetermined wavelength at a second of said at least two analytical detectors;
- generating signals corresponding to said detected radiation;
- summing signals generated by said analytical detectors;
- and
- analyzing the summed signals generated by the detectors.
Dependencies are inferred from the claim text.