G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/25 (2006.01) G01N 21/35 (2006.01) G01N 21/31 (2006.01)
Patent
CA 2000305
ANESTHETIC AGENT IDENTIFICATION ANALYZER AND CONTAMINATION DETECTOR ABSTRACT OF THE DISCLOSURE A gas analyzer for measuring the transmission of infrared radiation through a gas mixture, determining the concentrations of the gases in the mixture, identifying one of the gases, reporting the concentration of the identified gas, and detecting contamination of the gas. The gas analyzer has a sample cell for containing the gas maxture, a source of infrared radiation, a set of specifically chosen filters, a signal processor, and a microprocesssor that computes the concentrations of the gases and implements decision logic for identifying one gas and detecting contamination of that gas. In one embodiment, a filter wheel holds the filters between the source and the sample cell and there is a single detector placed downstream from the sample cell. In a second embodiment, a chopper produces an AC signal from the infrared radiation source and there are three filters, one in front of each of three detectors. An alternate embodiment measures, calculates, and reports the concentrations of three anesthetizing agents.
Andros Analyzers Incorporated
Macrae & Co.
Williams Kevin G.
LandOfFree
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