Patent ID: 11913879
Assignee: FOCUS UNIVERSAL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A method for detecting the presence of a gas in a sample, comprising:
providing an IR lamp, the IR lamp generating light in the IR spectrum;
directing the IR spectrum light in to a first interior of a first sample tube section, the first sample tube section including a second end portion, the first interior of the first sample tube section containing a first sample of a mix of gasses from the local atmosphere;
transporting the IR spectrum light through a light pipe material;
directing the IR spectrum light in to a second sample tube section placed in parallel with the first, the second sample tube section having a second interior, the second interior containing a second sample of a mix of gasses from the local atmosphere; and
detecting a filtered band of the IR spectrum light, the filtered band being centered on a detection wavelength, a reduced amount of filtered IR spectrum light at the detection wavelength being indicative of the presence of a gas which absorbs IR spectrum light at the detection wavelength.