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

Claim 12:
13. A sensor for detecting the presence of one or more gasses, comprising:
an IR lamp which generates light in the IR spectrum;
a first sample tube section receiving light from the IR lamp, the first sample tube section having a first interior containing a first sample, the first sample including a mix of gases from the local atmosphere, the IR spectrum light passing through the interior of the first sample tube section to a second end portion of the first sample tube section;
a flexible light pipe section including a first end portion and a second end portion, and having an arcuate shape so that a first end portion and a second end portion of the flexible light pipe section face the same direction, the first end portion of the flexible light pipe section located adjacent to a second end portion of the first sample tube section, the second light pipe section receiving the light at the second end portion of the first sample tube section and transmitting the light from the first end portion to the second end portion;
a second sample tube section including a first end portion and a second end portion, the first end portion of the second sample tube section located adjacent to the second end portion of the second light pipe section, the first end portion of the second sample tube section receiving the light from the second end portion of the second light pipe section, the second sample tube section having a second interior containing a second sample, the second sample including the mix of gases from the local atmosphere, the light passing through the interior of the second sample tube section to a second end portion of the second sample tube section;
a filter located at the second end portion of the second sample tube section, the filter bandpassing a band of IR spectrum light centered on a detection wavelength, the detection wavelength indicative of the presence of a gas in the mix of gases from the local atmosphere; and
a detector located next to the filter, the detector detecting the amount of IR spectrum light at the detection wavelength.