| BAH Holdings LLC Patent applications |
| Patent application number | Title | Published |
|---|
| 20120057161 | OPTICAL GAS AND/OR PARTICULATE SENSORS - A gas or particulate sensor is provided for the detection of at least two target gases and/or particulates. The sensor comprises: a chamber for containing a gas sample under test; a first optical measurement channel configured for the detection of a first target gas or particulate within the gas sample, and a second optical measurement channel configured for the detection of a second target gas or particulate within the gas sample, each optical measurement channel comprising a respective optopair which comprises a radiation source adapted to emit radiation and a radiation detector adapted to output a signal in response to detected radiation; and focusing optics able to form an image of an object. At least the first optical measurement channel is configured such that the radiation detector of the respective optopair receives via the focusing optics an image of the corresponding radiation source, whereby the radiation received from the radiation source by the radiation detector is modified by the first target gas or particulate present in the gas sample such that the output signal from the radiation detector provides information as to the presence of the first target gas or particulate in the gas sample. | 03-08-2012 |
| 20110116079 | OPTICAL ABSORPTION GAS ANALYSER - An optical absorption gas analyser is provided for determining the concentration of a target gas in a sample, comprising: a chamber for containing the sample in use; an optopair, comprising a light emitting diode (LED) arranged to emit radiation into the chamber and a photovoltaic radiation detector, arranged to detect radiation transmitted through the chamber from the LED and to output a corresponding detection signal S | 05-19-2011 |
| 20090268204 | OPTICAL ABSORPTION GAS ANALYSER - An optical absorption gas analyser for determining the concentration of a target gas in a sample is disclosed. The analyser comprises a chamber for containing the sample in use; a radiation source assembly arranged to emit radiation into the chamber; a first radiation detector assembly arranged to detect radiation transmitted along a first optical path through the chamber and a second radiation detector assembly arranged to detect radiation transmitted along a second optical path through the chamber, wherein the length of the second optical path which the sample can intercept is shorter than that of the first optical path. The analyser further comprises a processor adapted to generate a sensing signal S | 10-29-2009 |
| 20090257064 | Optical Absorption Spectrometer and Method for Measuring Concentration of a Substance - An optical absorption spectrometer is provided for determining the concentration of a substance within a sample. The optical absorption spectrometer comprises a first radiation source for supplying radiation to the sample to be measured; at least one cavity for containing the sample during measurement; and a detector assembly for detecting radiation transmitted along first and second optical paths through the sample, the length of the first optical path being greater than that of the second optical path. | 10-15-2009 |
