Patent ID: 9678010
Date: 2017-06-13
CPC Classifications: G01N

Claim:
1. A closed path infrared sensor for detection of a gas analyte, comprising: an enclosure, a first energy source within the enclosure which emits energy at a first wavelength absorbed by the analyte, at least a second energy source within the enclosure which emits energy at a second wavelength absorbed by the analyte, at least one detector system within the enclosure, and a mirror system external to the enclosure and spaced from the enclosure, the mirror system reflecting energy from the first energy source to the at least one detector system via a first analytical path to output a first analytical signal indicative of gas concentration in an environment external to the enclosure and reflecting energy from the second energy source to the at least one detector system via a second analytical path to output a second analytical signal indicative of gas concentration in the environment external to the enclosure, each of the first analytical path and the second analytical path being less than two feet in length.