Infrared sensor
First Claim
1. A chemical sensor for detection of one or more infrared active analytes in a gas in contact with the sensor which comprises:
- an infrared source;
two or more sorbent layers each deposited on a surface of a substrate that is IR transparent or that is formed into an IR transparent element; and
an infrared detector;
wherein each sorbent layer is in contact with the gas;
wherein each substrate is mounted in the sensor such that each surface upon which a sorbent layer is deposited is perpendicular to the direction of propagation of infrared light emitted from the infrared source and wherein infrared light emitted from the infrared source passes through the one or more sorbent polymer layers and is thereafter detected in the infrared detector.
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Accused Products
Abstract
Devices, materials and methods for the detection of one or more target analytes, particularly volatile organic compounds (VOCs) in air or other gases. Point sensors and sensor arrays for the detection of one or more of such analytes in air or other gases. Sensors employ the detection of IR absorption of wavelengths characteristic of a target analyte or a class of target analytes to detect the presence of and/or measure the concentration of one or more target analytes in air or other gases. Sensors employ sorbent layers into which one or more of the target analytes are adsorbed from the air or other gases to be analyzed. Preferred sorbent layers comprise polymer sorbents, metal oxide sorbents or mixtures thereof.
60 Citations
31 Claims
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1. A chemical sensor for detection of one or more infrared active analytes in a gas in contact with the sensor which comprises:
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an infrared source;
two or more sorbent layers each deposited on a surface of a substrate that is IR transparent or that is formed into an IR transparent element; and
an infrared detector;
wherein each sorbent layer is in contact with the gas;
wherein each substrate is mounted in the sensor such that each surface upon which a sorbent layer is deposited is perpendicular to the direction of propagation of infrared light emitted from the infrared source and wherein infrared light emitted from the infrared source passes through the one or more sorbent polymer layers and is thereafter detected in the infrared detector. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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2. (canceled)
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11-15. -15. (canceled)
Specification