Abstract: Gas within a ventilation circuit is analyzed by a spectrometer included in an airway adaptor that is inserted into the ventilation circuit. The spectrometer is formed from reflective members that process electromagnetic radiation while folding the path of the electromagnetic radiation in such a manner that the form factor of the airway adaptor is enhanced. Further, because of the scale of the spectrometer within the airway adaptor, the cost savings associated with manufacture of the reflective elements instead of refractive elements may significantly reduce the cost of the airway adaptor.

Abstract: A source assembly (48) configured to generate infrared electromagnetic radiation includes an emitter (60) that emits electromagnetic radiation over an emission solid angle. A portion of the emitted electromagnetic radiation is used in a detection. The portion of the user electromagnetic radiation surrounds the optical path in a usable solid angle. Electromagnetic radiation outside of the usable solid angle is focused back by a reflection assembly (64) onto the emitter to enhance the efficiency of the emitter.

Abstract: A filter wheel and a spectrometer including the filter wheel are disclosed. The filter wheel has a first support structure on which a first plurality of filters are mounted and a second support structure on which at least one filter is provided. A radiation source generates a radiation beam, and a beam splitter splits the radiation beam into a first detection path and a second detection path. The first plurality of filters are selectively movable into the first detection path. The at least one filter on the second support structure is arranged to be disposed in the second detection path. The spectrometer includes a first radiation detector that detects radiation that passes through the selected filter in the first detection path, and a second radiation detector that detects radiation passing through the filter in the second detection path.

Abstract: A source assembly (48) configured to generate infrared electromagnetic radiation includes an emitter (60) that emits electromagnetic radiation over an emission solid angle. A portion of the emitted electromagnetic radiation is used in a detection. The portion of the user electromagnetic radiation surrounds the optical path in a usable solid angle. Electromagnetic radiation outside of the usable solid angle is focused back by a reflection assembly (64) onto the emitter to enhance the efficiency of the emitter.

Abstract: A filter wheel and a spectrometer including the filter wheel are disclosed. The filter wheel has a first support structure on which a first plurality of filters are mounted and a second support structure on which at least one filter is provided. A radiation source generates a radiation beam, and a beam splitter splits the radiation beam into a first detection path and a second detection path. The first plurality of filters are selectively movable into the first detection path. The at least one filter on the second support structure is arranged to be disposed in the second detection path. The spectrometer includes a first radiation detector that detects radiation that passes through the selected filter in the first detection path, and a second radiation detector that detects radiation passing through the filter in the second detection path.

Abstract: A high speed burner having very low polluting emissions, suitable for the process for heat treatment furnaces of a load in free atmosphere. The burner is capable of creating a compact and lean flame with the peculiarity of keeping the NOx emissions at very low levels at any chamber temperature and at any excess combustion air. The burner requires a single inlet for the comburent air and a single inlet for the combustible gas.