NDIR sensor, sampling method and system for breath analysis
AssigneeAmphenol Thermometrics, Inc.
InventorsDavid Henderson, Andrian Kouznetsov, James Sciaini
Life of this patent
Estimating the term…
Abstract
A gas sensor has a light detector, a gas-tight support structure enclosing the light detector, a window positioned in said support structure, and a light source mounted to the support structure. A sample area is positioned in the support structure to receive a gas to be tested. The light source is aligned with the window, sample area, and the light detector to pass light from the light source through the gas in the sample area to the light detector. The sensor can be provided in a breadth sampling apparatus that has deflects gas to a bypass route so that only a portion of gas reaches the sensor.
Claims20
A gas sensor comprising:
- a support;
- an optical detector mounted to the support;
- and
- a support assembly mounted to the support and having:
- a base portion enclosing the optical detector between the base portion and the support;
- a middle portion with at least one opening and a central space whereby gas enters through the at least one opening;
- and
- a top portion having an optical source arranged opposite the optical detector relative to the middle portion, wherein optical radiation passes from the optical source through the central space to the optical detector;
- a window arranged within the base portion and positioned over the optical detector;
- and
- a gasket seal arranged between the window and the base portion and configured to seal the window about the optical detector and isolate the optical detector from the central space.
A gas sensor comprising:
- a printed circuit board;
- a light detector mounted on the printed circuit board;
- a support structure enclosing said light detector on the printed circuit board, wherein said support structure comprises a base portion sealingly engaged with the printed circuit board and defining a gas-tight area about the light detector;
- a window positioned in said support structure;
- and
- a light source mounted to said support structure aligned with said window and said light detector to pass light from said light source to said light detector through said window.
Dependencies are inferred from the claim text.